Malicious PDF — malware analysis report

Static analysis result for SHA-256 622420afcc2a252a…

MALICIOUS

PDF

95.5 KB Created: 2021-07-30 09:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 8daee445a6f41469bcdfa9f3d1204948 SHA-1: 21cc9cf9a40874d1050db0a9e31d36b57ba5cd25 SHA-256: 622420afcc2a252ad1db03524c5c80138566c89e79e4d4482fedba107e738a22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=sonic+3+angel+island+revisited+play+online PDF link annotation
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/zikefewewepakuz.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1c4039912---kigubowuve.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085602c126bb---50624303825.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c41c37a58a4b371a2fb1b8c2aa34f62f/wejipamijez.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090958cdcf20---midamejepamajopelekegidi.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/k6stqjml0ahsj890i50dltnseu/40068260771.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/thib7566b62mu4uj7gifi8svf7/75984475611.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8a2214f1d5bf18204ad081a255652604/pilalafatived.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/3ea659357cf419071bfe6b5d37f7698c/vasanutojusevodo.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/10858684970.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/01ed1886dfb3d4591b858782f42e44d9/lanogonuk.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8090a14d8---gamudedovufirigavulogipap.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/61590178052.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/7b22b1103143bcfd194f593e83103408/jinujisumukatake.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cecfd530978ede8a675f91240ebdaf95/betojovawowiledur.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/rekurukinevaxixatafajeduw.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/zofinapim.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bd9f0f2f---toxazomuxegegikefafosiwa.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075452b9d6aa---fibosutora.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/reraxigemivurakid.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071720c8e3d7---riradanofolaxamolopiso.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609285050ecd3---tojefukobirumefijosi.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bfc8806f3---naveziketebezuru.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/5e436775f529a8d7be3130729074ec62/kalof.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/kadofunowalaxobaxanax.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/82887094395.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/35294433434.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off00011018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 17304 bytes
SHA-256: ec07ac9f416a61ebca00658ea582cbb0f43b5e15a4932a2bbdae6e4bfecba528
font_02_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001558a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558A 11116 bytes
SHA-256: 078b8347b1173240e415a3ab67afd65d8a31248092c05dcbbae4b6b819549225