Malicious PDF — malware analysis report

Static analysis result for SHA-256 55aff30081638d0d…

MALICIOUS

PDF

107.2 KB Created: 2021-03-20 05:13:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3d9b12c119f0104dc446665b29edf00b SHA-1: 929667de3cd6ee143208294b29a088cf9290f2d5 SHA-256: 55aff30081638d0dc9ebdd604f5e541e32f9155b37b1f952ac19ecd15df4d55a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://baarspo.ru/wix?keyword=warship+battle+cheat+my+way' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://baarspo.ru/wix?keyword=warship+battle+cheat+my+way PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373281/normal_602e3ff19b86d.pdfIn PDF document text
    • http://artistichomesolutions.com/weripulakuxinowaka5smww.pdfIn PDF document text
    • http://2022god.com/how_to_train_your_dragon_4_full_movie_in_english_2019cy2op.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/aGTfgcn/7640193988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_6015f28b8bd15.pdfIn PDF document text
    • https://cdn.sqhk.co/megodiwe/cjenui3/54306405057.pdfIn PDF document text
    • https://cdn.sqhk.co/rijelonijas/iaSKgfD/68479002594.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/mozabog3n28c.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/hixaheO/top_500_most_popular_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/1ifZjek/troll_face_quest_video_games_walkthrough_level_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_604fe3f615a78.pdfIn PDF document text
    • http://zerulowomuv.22web.org/definition_of_memory_in_psychology.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/jbRbhdb/40639247223.pdfIn PDF document text
    • https://cdn.sqhk.co/vabedesi/vhd9kHz/4546227743.pdfIn PDF document text
    • http://svoydvalend.xyz/hazardous_waste_storage_guidelinesv4v67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_5fd158b558787.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_c038e5b6ad854a3ca649e2fe25510545.pdf?index=trueIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_c412cb774b6048d199f9585f35c8a400.pdf?index=trueIn PDF document text
    • http://goruloloxoz.rf.gd/battle_royale_3d_warrior63_apkpure.pdfIn PDF document text
    • http://volapubexu.epizy.com/lulolizavigarogogavo.pdfIn PDF document text
    • http://wazozugafen.epizy.com/everquest_p99_druid_leveling_guide.pdfIn PDF document text
    • http://satekivu.rf.gd/jodalipob.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_off00015f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4A 5520 bytes
SHA-256: 8ac78c1d9d491d543697038ab6cf256da61851d631c22b9edb0b79236be7be6c
font_01_sfnt_off00017200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17200 15176 bytes
SHA-256: eebc6e81db107be063acbf4333e6c4b7396cb5d1247f4cce50e5f0649cd39204

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