Malicious PDF — malware analysis report

Static analysis result for SHA-256 626eb051a0fe13de…

MALICIOUS

PDF

82.8 KB Created: 2021-03-21 01:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e3d59a73c070a97bb9ffc81afd00346 SHA-1: e99a865ab988850d00fe05cc4810f3b6b9397428 SHA-256: 626eb051a0fe13deec9866edba08dc9539ae7663ade57c3552743cbaa174fe2f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The primary URL, https://mezovuduw.ru/aws?utm_term=gears+of+war+crackwatch, suggests a lure related to game cracks, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=gears+of+war+crackwatch
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/507401.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/60174a3e8d.pdf
    • https://vokavize.weebly.com/uploads/1/3/2/7/132710687/054fb84b.pdf
    • https://vilotirupoj.weebly.com/uploads/1/3/5/3/135328316/galerub-silejeg-navetutiw.pdf
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/3675230.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_602103c679e3f.pdf
    • https://minajekefejuwow.weebly.com/uploads/1/3/0/7/130776819/18836711.pdf
    • https://cdn-cms.f-static.net/uploads/4445101/normal_603b4ec2aaf67.pdf
    • https://cdn-cms.f-static.net/uploads/4450354/normal_602739f001ffd.pdf
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/1379187e1f8161.pdf
    • https://static.s123-cdn-static.com/uploads/4393345/normal_6006f947b28a9.pdf
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/9576618.pdf
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/7347334.pdf
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/2703612.pdf
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/sigep-bewadaditofu-pemige.pdf
    • https://cdn-cms.f-static.net/uploads/4372960/normal_600e67d3e32d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mafavuzenoliki/property_damage_report_example.pdf
    • https://uploads.strikinglycdn.com/files/ac337ddb-48c4-4fc3-9453-f750744a9a77/shall_i_compare_thee_analysis_line_by_line.pdf
    • https://uploads.strikinglycdn.com/files/212dbaed-9e04-4718-b3b5-1a7ce519ecd4/badebebizagiwavixiban.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/supernatural_castiel_and_dean.pdf
    • https://uploads.strikinglycdn.com/files/971198ac-b715-4455-8880-7ec9841c0535/18544084275.pdf
    • https://s3.amazonaws.com/davubewu/32962585383.pdf
    • https://uploads.strikinglycdn.com/files/37fcb45a-a160-411b-8a8a-cc134f27b719/self_reliance_quote_analysis.pdf
    • https://uploads.strikinglycdn.com/files/971d9a96-f80b-46ba-88c4-709662e318d0/the_ultimate_guide_to_the_rider_waite_tarot_free.pdf
    • https://s3.amazonaws.com/liwara/lazes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f4.bin
62fe24c4172c3cd4ba09e34d235235bebc52f0cd1c61d0c29c3f40d155095b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 5124 bytes
font_01_sfnt_off00011876.bin
77896e2c55bfd3885a92a78b7d9056458bf41e945c8f999b9c42e8964770270c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11876 10796 bytes

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