Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efe0750f61f2ac1…

MALICIOUS

PDF

82.0 KB Created: 2021-03-15 10:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f5281dd955fed89a34d207784b865c SHA-1: 4f155a12ff09a522f29fdb87f28c84385e136154 SHA-256: 2efe0750f61f2ac15bf1613cefccefdb73340c634e157449e2076880f9e6afb3
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, many pointing to Weebly and S3-based PDFs, suggesting a link farm or SEO manipulation tactic. The primary external URI, 'https://lozipotod.ru/wix?keyword=tyt+md-2017+manual+pdf', indicates a potential lure related to a manual, which is a common phishing pretext. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=tyt+md-2017+manual+pdf
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5ffb1744cf538.pdf
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/vozuwabizazojumuf.pdf
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/taxibogunigigem_bifemesu_fenoruwok.pdf
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/paladebuvaf.pdf
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/177f66b506f7a.pdf
    • https://cdn-cms.f-static.net/uploads/4477408/normal_600fe8d39f3db.pdf
    • http://lasomupigo.iblogger.org/nebaxuzuwofubimel.pdf
    • https://cdn-cms.f-static.net/uploads/4384647/normal_6011726abc74c.pdf
    • https://xozemupugumofu.weebly.com/uploads/1/3/4/3/134320042/960939.pdf
    • https://lajizifoposu.weebly.com/uploads/1/3/5/9/135958207/xopajuporu.pdf
    • https://cdn-cms.f-static.net/uploads/4403954/normal_60119bfa13159.pdf
    • https://lutavazakagege.weebly.com/uploads/1/3/1/3/131398084/b09784cda249.pdf
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5fd643d2f1ec5.pdf
    • http://golegujunag.iblogger.org/53173560875.pdf
    • https://cdn-cms.f-static.net/uploads/4382965/normal_603b2e30a91e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vuxalirudidel/minority_report_short_story_characters.pdf
    • https://s3.amazonaws.com/bisapovepizaj/htc_m8_mini_price_in_nigeria.pdf
    • https://s3.amazonaws.com/vajefam/2009_porsche_cayenne_manual_transmission.pdf
    • http://xefobimulekojuw.epizy.com/mumaboki.pdf
    • https://s3.amazonaws.com/wujodibu/unity_game_design_software.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7be.bin
ffe008f00bdab04e42d0fb58581e94ebe343bab047a3ea3be819508d06260cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 2960 bytes
font_01_sfnt_off0000f22e.bin
2c1cf47b3e262c6e821d22c3264613f122842438040bbc3b7d00aa1f7d8fa275		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 5008 bytes
font_02_sfnt_off00010335.bin
cfbd25f7f89ee102f41d4f3a33ebe773f1af58a8512fdc29be46011e9f51065e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 12116 bytes
font_03_sfnt_off00012be2.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 4324 bytes

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