Malicious PDF — malware analysis report

Static analysis result for SHA-256 c600ad10de0d391f…

MALICIOUS

PDF

73.6 KB Created: 2021-03-31 01:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f04a4fbdb7edd8324e351e15824f05cc SHA-1: 75191f4b2638b6cfb94231c160af75e1d0e705b0 SHA-256: c600ad10de0d391fa734c1956ed5fe1f667d03b84019ae356dec9c08d1a37506
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO spam tactic. The primary malicious URL identified is https://bologen.ru/wix?keyword=bar+x+ranch+angleton+tx+land+for+sale, which is likely used to redirect users to unwanted content or further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=bar+x+ranch+angleton+tx+land+for+sale
    • http://peromopativej.mypressonline.com/42329347266.pdf
    • https://cdn.sqhk.co/xurakipigub/oydjjOY/spades_app_for_android_and_iphone.pdf
    • https://cdn.sqhk.co/xejarirep/ian2AR9/mifitasi.pdf
    • https://cdn-cms.f-static.net/uploads/4385647/normal_60126a05ed47f.pdf
    • http://mimivudarevi.scienceontheweb.net/journal_store_atmosphere.pdf
    • https://cdn.sqhk.co/bipuzojafa/shciii1/gopamemalipibomuvisid.pdf
    • https://cdn.sqhk.co/zolilobup/u3Xgfji/car_driving_simulator_2020_ultimate_drift.pdf
    • https://cdn.sqhk.co/mujejadalale/eBzghjN/copper_scrap_metal_prices_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4417648/normal_60115930ad4da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dinigugaxej/husky_quiet_air_compressor_home_depot.pdf
    • http://sorisavitekinuj.onlinewebshop.net/g_shock_rangeman_carbon_fiber_strap.pdf
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_be9adaf82abe49e2b1f0bb52e0df118f.pdf?index=true
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_f79111cdf7434416b69eef21f4316507.pdf?index=true
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_aa1de25f217a4c1c81ad5365db796dc4.pdf?index=true
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_b897e4c74174453fa6f5acd5a947690f.pdf?index=true
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_6f012b5fd02244c6931a620522f9c2f6.pdf?index=true
    • https://s3.amazonaws.com/bovenotojitowe/79875171087.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d289.bin
0ffc824a39b8ade9ddcebfa0b1d26dc612bf56910703249e5c42f79b4ee68088		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 5140 bytes
font_01_sfnt_off0000e3f9.bin
7e4f94c9a26989659fddc56841cff8f34870b41fdb96a741bb769265abffdd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 11792 bytes
font_02_sfnt_off00010aef.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 4324 bytes

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