Malicious PDF — malware analysis report

Static analysis result for SHA-256 4303769e6dec2e3a…

MALICIOUS

PDF

82.4 KB Created: 2021-03-31 06:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d108ff3392a12bd6089dc549622d2fae SHA-1: 00297853fdf6cb46a2ef4d514acbbeebad9f77fc SHA-256: 4303769e6dec2e3aab65d72a4a8fbf5f014f9a6c2fe66474bb918c3a740b2d7b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'Warhammer 40k books pdf free download', suggesting a lure for users seeking such content. The presence of numerous external URLs, many hosted on disposable domains or link farms, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=warhammer+40k+books+pdf+free+download PDF link annotation
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/85381.pdfIn PDF document text
    • https://fikobovivinuzo.weebly.com/uploads/1/3/0/7/130739062/resuxududi-pagopivix-xukezu-notesagera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600b3353e8f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_604366d1ee2c8.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxidubez/cidTjhL/59408782781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366647/normal_5fcbcefde36fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_6000ac56581b4.pdfIn PDF document text
    • https://milakixu.weebly.com/uploads/1/3/1/4/131483020/6183399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_6058fadecf431.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/id24hbm/online_marketing_strategy_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_600cec832e04f.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/t5ieAje/84811027239.pdfIn PDF document text
    • http://ceter.xyz/lokeworafalalazegobubtytwd.pdfIn PDF document text
    • http://azules.ru/night_shift_cast_season_4_episode_10c23gg.pdfIn PDF document text
    • http://lojapunerilifev.22web.org/14352398341.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/c9HijvX/49737306665.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/pjijcia/lewikatasaxomomodizax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_602f6e359c3d5.pdfIn PDF document text
    • http://dogisutuzise.22web.org/banach_tarski_paradox_proof.pdfIn PDF document text
    • http://moymagazin.xyz/wejuxafujurumejitiylgh2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fefefekarut.epizy.com/95379351533.pdfIn PDF document text
    • http://vowefaxi.epizy.com/4347634408.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 5480 bytes
SHA-256: 592b406d072b4e188c82952e35c4c89755f2d068170de5c605deb986d3b3a9dc
font_01_sfnt_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 2304 bytes
SHA-256: f5f5b903498e123e203e5bc02bfb313eaed648c4639c86476d90aa0ec20d3981
font_02_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 11948 bytes
SHA-256: 1803279af9d58d528a4b544b0d39fc0cbb9ebee0a8e6638eb2f972ae38453044
font_03_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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