Malicious PDF — malware analysis report

Static analysis result for SHA-256 a203400fdd93e106…

MALICIOUS

PDF

80.7 KB Created: 2020-12-28 22:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed4f1ffe1f0e098824753edf837eed2 SHA-1: 13e5b0a9869e49c6b14e64a63b0b2441143f175c SHA-256: a203400fdd93e10667d3fd1868ad8cc4b12708bf04f299f8bce37d75837d75b0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. One prominent URL, 'https://traffnew.ru/strik?utm_term=distraint+pocket+pixel+horror+pc', appears to be the initial lure, disguised as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffnew.ru/strik?utm_term=distraint+pocket+pixel+horror+pc
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/40cdffa473d.pdf
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/5957099.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdf
    • https://girejegi.weebly.com/uploads/1/3/4/4/134490844/5941724.pdf
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/295d2dfcea6da.pdf
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/welupu_vorigisivudure_tenidevajugul.pdf
    • https://kisigitoteke.weebly.com/uploads/1/3/3/9/133997396/1161501.pdf
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/xukugugarazobew-rowemu-lumipenesip.pdf
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/togazopijujofixi.pdf
    • https://gusizamavuva.weebly.com/uploads/1/3/4/6/134629738/a4645f0a13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f75e20a6-f387-494f-a8ca-8fa725ca0adb/10086497501.pdf
    • https://s3.amazonaws.com/bezorito/free_mercury_mountaineer_repair_manual.pdf
    • https://s3.amazonaws.com/jebokizez/outcasts_united.pdf
    • https://s3.amazonaws.com/rupatojuko/pandavar_bhoomi_tamil_songs_free.pdf
    • https://uploads.strikinglycdn.com/files/05c3d357-6e10-400a-aa7d-d3a85c30bf9b/gumafi.pdf
    • https://s3.amazonaws.com/waxegatulo/zepadarematusuwirawupofax.pdf
    • https://s3.amazonaws.com/jidosatikim/pagefarak.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d865.bin
73557fd4b9a2faa9f31fa694fff4ee7b49963c6428b4887cd33583d0d4a3c7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 3068 bytes
font_01_sfnt_off0000e32a.bin
55b1a9ebc32ddb80a94dfdc1ebfc7663174f39f074c1aff9081ae8a090378828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 4940 bytes
font_02_sfnt_off0000f3d9.bin
a29a40b3cba42f7616bbca9097b977180637dc6df262ece93b2f3053fd6e2c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 3596 bytes
font_03_sfnt_off000101eb.bin
e3bfd72b2351797aaee00f6f2d97b075cd7b89d945432929746703b64e70936a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 10676 bytes
font_04_sfnt_off00012685.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 4324 bytes

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