Malicious PDF — malware analysis report

Static analysis result for SHA-256 4117d4a0c67f089d…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 05:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 91e639120320a31f561d656ce41d879a SHA-1: 97ae88303b827e82bec49a7161858422ea510bfd SHA-256: 4117d4a0c67f089dff6ec69079ce1c4519258123593d8334020b342003454f67
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to directing users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=ed+endings+pdf PDF link annotation
    • http://nesthomes.in/userfiles/file/dimoxavijigupamuxovup.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051522237_1046073841.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/mofuxolujeluwujur.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/15f359ccf31191de156b931422e09106/lusutowawemejipinazeju.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/76818801418.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/91939897315.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/kuxadobezunadinemokoposos.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/36392145939.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61296c9ff---lelolubogitezisi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160803188b4f98---mesuxafeduvaxunavalib.pdfIn PDF document text
    • http://dentherapia.hu/files/file/pezudekusaguvujanexitok.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e88246308a---dexavojopuxoxirazela.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/wukaxegudenugubanapon.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c93010e0b3d---75191550966.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/70464224434.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b9f17b016e2b2ebf71c7a4bc0b3d8342/nosuzujubis.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/35004521696.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/8480819238.pdfIn PDF document text
    • https://fototipia.hu/files/files/83927046974.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/lugod.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/33735158875.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/kefubijowuwupofibaxuwod.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add77d1bb47---kuludejuro.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 19720 bytes
SHA-256: 59b38ae22c23bace43cebf7b8fc38cc931fb3717c4367e6af23d8375ce8098a4
font_01_sfnt_off000107bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BC 10128 bytes
SHA-256: 592c6cc9fc4b7998e7f3f9772b426c1cd7aaa9fbb24969bbb8885668526e5f1f
font_02_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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