Malicious PDF — malware analysis report

Static analysis result for SHA-256 a183e0d0091bf2ce…

MALICIOUS

PDF

80.3 KB Created: 2021-03-21 11:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 133fca34d6bf2988f8228c9eafed2e8d SHA-1: 09616672aa62fc78316d9161b2bcb5255f08c6c6 SHA-256: a183e0d0091bf2ce2e07554f7667c65a80ba341a2dc09a85bba9ce2d21a276e1
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=how+to+find+sex+offenders+in+texas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389797/normal_5ffd2fda7a807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471706/normal_60004d94be405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_601e36dd0629c.pdfIn PDF document text
    • http://noxopadorilu.iblogger.org/41281437409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_6049129e3fec8.pdfIn PDF document text
    • http://lesudabulaladi.22web.org/what_is_the_formula_for_volumetric_flow_rate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480579/normal_5fe189e8627f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/color_sheets_of_cars_and_trucks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6efadd92-4b53-4405-b8f6-1068d8387ebf/harbor_breeze_customer_service_phone_number.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_a79b5c6de0ac4c95b2e4c0c61042b549.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/52355774406.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/tukadejawojexupagamaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b983c4bf-258f-4389-889c-ea506d773ee4/pefewawite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32544e2f-29a1-4a49-b41f-042c3b8cb860/game_of_thrones_graphic_novel_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/pearl_harbor_facts.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_3d4b713b656941f9bda64e37e02dc0cc.pdf?index=trueIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_cc56ebed8b0242cab56633e165e5bf66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitatotol/junior_high_school_report_card_comments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6785f615-60dd-490c-bf0b-6ca886c881c9/gre_quantitative_percentiles.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 4988 bytes
SHA-256: 24eeed5a578ef4c6a673f9af7af970a3924b39a241217aaf22292ea1a80bffb4
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 11032 bytes
SHA-256: 017a881139f8ee30182a34f7954f5dbcdd09b853072e1c1f6373d4f468699c83

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