Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a217d22f7e31550…

MALICIOUS

PDF

79.9 KB Created: 2021-02-24 00:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b9ee4279361a953b8e31aca770faef22 SHA-1: 9d4226b26f021f49aaf815a8d27ca38b8ff09b34 SHA-256: 3a217d22f7e31550f40b06c0fef3d89f15f046b8f818d0e684bf319be2a3c8c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains and acting as a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely aiming to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=othello+iago%2527s+soliloquy+act+1+scene+3+analysis PDF link annotation
    • http://wajufogisabo.iblogger.org/niviwavexetulidaw.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/3785617.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/nusojop_fowimomujefis_jugolupi_nafagef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_60338158a18c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_60118a0a169c9.pdfIn PDF document text
    • https://vukojudal.weebly.com/uploads/1/3/5/3/135317211/mafakolipuvaf-milirivebapu-gebakera.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/jhjieji/monkey_run_game_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/n0gjchd/absorption_spectrum_photosynthetic_pigments.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/iijhmha/fisetesifuxogux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5fe56173c552d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_601a30484f1f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fc5c4ccd4d20.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/8wRgdjj/hearts_free_card_game_app.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/rotaxeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465388/normal_5ffa8943ab8eb.pdfIn PDF document text
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/tojimenagatufugijeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445550/normal_600216022afbf.pdfIn PDF document text
    • https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/9442386.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemujiv.epizy.com/railway_reservation_form_doc_format.pdfIn PDF document text
    • http://xafamikipu.epizy.com/75980787130.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://scripts.sil.org/OFLIn 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_off0000e6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F8 5468 bytes
SHA-256: 7657ed4b279213e9cf0edfa0b0ef051cb3ffce17fa707fd82e3c878516a3231c
font_01_sfnt_off0000f9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B3 10072 bytes
SHA-256: 5e2c04562d7beca47d82f953dad4739d87d355660ff6e2f8ae23f05ea7dcf23e
font_02_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 16084 bytes
SHA-256: dd003ab6b3fc3a451384952dc652c5fa5bce06a9b3c4d992b98c25fd7829260c

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