Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca7949e886a9c41…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 02:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 808b902a1df96c027b94a90b84a0144d SHA-1: ec5ed7ddcb4f188d602811ec0f5382cd89942725 SHA-256: 2ca7949e886a9c4103854c86821df31eed24b7bc8d8d9e050079e59607815de3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a visual download button lure and numerous links pointing to compromised WordPress sites, suggesting it is designed to trick users into downloading further malicious content. The presence of external URIs and links to compromised CMS uploads reinforces the phishing and potential exploitation vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=how+to+receive+an+invite+on+minecraft PDF link annotation
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/dbc22524568bd8d7d46897ab7ea3932f/wilix.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/27c613e902aac73aa3dc16ce7518f9a4/vomabobi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/35a0dba5e2e7fd9effd01d669813be24/61627463370.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd52a399b2---gerivonepetimar.pdfIn PDF document text
    • https://nevisnews.com/userfiles/ziwapowikaru.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c431a8b4ee5---mukuvifadubafifexonirizo.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607e753eec69d---11746057503.pdfIn PDF document text
    • https://autoparkalbanese.it/file/wavipotubuzukatobefo.pdfIn PDF document text
    • http://amandamaitland.com/images/file/wuxelikalegurogumuzapo.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/69047798793.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/47391170266.pdfIn PDF document text
    • http://sgpeo.pl/users//file/samujaroz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/79c6ea92db6c541652ca54c19a81f8eb/kibosixovolulabinafumeved.pdfIn PDF document text
    • https://eetravel.net/file/welorojojipijenavonupidek.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/taxivuxisiwonip.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/67301883468.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/potovepixegesu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4860f1b3---majobamixegozuwusudepakez.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/gadipelarepefimobinagewor.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/59022937032.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/xodasesegunuwonododedur.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/435cf5336e6842a29b1964601c675fb5/18341146096.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607649eb62db2---20555539008.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 17688 bytes
SHA-256: 824c919a2f64f6fc9ec6fecd6409b721a201e5286ce7f65b7a66caf2f3cebefe
font_01_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 10424 bytes
SHA-256: a4b4a11a813355237ec66cba1836ffbbcf14580b4953a92f4a7ba15db3a30589
font_02_sfnt_off00012dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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