Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3fac30d6108b27…

MALICIOUS

PDF

81.2 KB Created: 2021-03-21 00:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf72c518fef55d7d9fcb534e8b88af40 SHA-1: 08169b23e9b129b9c8d48f63c5b80102e2bffffa SHA-256: 4d3fac30d6108b27c53ebf41970c7688e80c1591efa9062dd5a3c0c8bd20e9d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a domain masquerading as a Google discussion platform, indicating a phishing attempt. No scripts were extracted, but the presence of the malicious URL and the overall classification strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://xezojetit.ru/123?utm_term=google+discussion+platform
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5feb50b79ac8a.pdf
    • https://gelokiranik.weebly.com/uploads/1/3/4/3/134330064/54dde3.pdf
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/321b800.pdf
    • http://jikusofare.mywebcommunity.org/remington_bolt_action_black_powder_rifle.pdf
    • https://cdn-cms.f-static.net/uploads/4427076/normal_603a5835a55f7.pdf
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/5c4a5296b8f.pdf
    • https://cdn.sqhk.co/fudikuzi/vjdjbPX/rejunozejisug.pdf
    • http://topukovatawosu.sportsontheweb.net/how_many_ounces_is_a_medium_sized_sweet_potato.pdf
    • http://kixiwogazu.sportsontheweb.net/filtrete_3m_thermostat_wifi.pdf
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/088e5e365e32b.pdf
    • https://gamidamivagug.weebly.com/uploads/1/3/5/3/135324690/lomofefini.pdf
    • http://sosuziba.mypressonline.com/alimentos_transgenicos_en_el_peru_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4379732/normal_6017c7ae6cb9c.pdf
    • https://static.s123-cdn-static.com/uploads/4415080/normal_5ff78761a2d9b.pdf
    • https://cdn.sqhk.co/jenuluvonuz/ncjaQhh/sanezifakamuwugagejinek.pdf
    • https://cdn-cms.f-static.net/uploads/4474727/normal_60386345b0280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fivebo/pikivujejitunoxego.pdf
    • http://vowojuxibaxo.myartsonline.com/neditulesoropesavomiro.pdf
    • https://s3.amazonaws.com/webipejonavuv/buxotuka.pdf
    • http://kepofif.onlinewebshop.net/is_fl_studio_good_for_vocals.pdf
    • https://s3.amazonaws.com/kudowo/influence_cialdini_notes.pdf
    • https://s3.amazonaws.com/wizidimawag/redajuzigor.pdf
    • https://s3.amazonaws.com/ruzaganog/pineb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd80.bin
4b1b353ee79ea5a982b3ec1b9d4e59933126af8099f349f3c2238f3ae5a55371
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD80 5508 bytes
font_01_sfnt_off00011030.bin
5f8959fc9e871feb4be916740aa6ae0e9338188e103e9a6afd64767321f5c713
pdf-font-stream PDF embedded font (sfnt) at offset 0x11030 11028 bytes