Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a741be36ae944a…

MALICIOUS

PDF

108.2 KB Created: 2021-08-02 03:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7c40231309876891490251ecf8bda556 SHA-1: d91c148650f9a6c7ee8a0b712cb3f4ba74ad320e SHA-256: 34a741be36ae944a998022a99e062982f21b41e6f03fe2d3d85d7b11d7fcc7bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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 http://jwnorthclassof70reunion.com/clients/c/c6/c6167e942b76adab5863fbee8ae727a7/File/90242051271.pdf In PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40e89376f---zedubufuxanejibexik.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/gozuju.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87729769964.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/uv93nn6uv32euakbspbus0hts8/kudufodav.pdfIn PDF document text
    • https://alutat.com/data/file/28118663097.pdfIn PDF document text
    • https://t2sc.me/userfiles/6227033929.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebd229c2b8---50146055871.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/venoxadirawovabotenif.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/wokejigamalajerozoforix.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/d98fb932b1f8328798582fb1b3e1d3ce/96420316041.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089d75f016da---bozojitakekonodazetozadi.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5cdd3934e9eba97af32bb84ec0c5b13/dawab.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa64ad72601---15188203605.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f825d7a003a---20341147507.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a03ed63dc2dacdbad39971eab163707/91523927464.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/tomeritinafib.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/1331939235.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/kodif.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/budodozix.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebc080f01b---76133861499.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/77832681608.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/35951459230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=principles+of+helicopter+aerodynamics+pdf+free+downloadPDF link annotation
    • 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_off00013796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13796 2576 bytes
SHA-256: 1f243aa6d6f27c499f5ff569f4bbe6609bb48eb723eb96ba3eb7286be48bbc46
font_01_sfnt_off00014282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14282 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A94 17048 bytes
SHA-256: b86e53e53e923425bafdbdee1ab443bed5891647e57a156afe4b71b11e038070
font_03_sfnt_off00018737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18737 11088 bytes
SHA-256: 66cd1b0a5fb61768d78663428fb5712a81faaf2a073b8c3da3b5f1ade0c9acee

Open this report in the interactive analyzer, or submit your own file for analysis.