Malicious PDF — malware analysis report

Static analysis result for SHA-256 79190d8df0ce8d9a…

MALICIOUS

PDF

82.5 KB Created: 2021-01-03 17:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f03e94761251e41c8e5039f829423f76 SHA-1: 92b4f4f3c9269afdc21fb0055fc92326c8350429 SHA-256: 79190d8df0ce8d9a9a5fffca3527bc208637ed448d078a4d0de00c91a9a28987
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains numerous external links, forming a link farm, and one of the primary URLs is 'https://traffset.ru/wb?keyword=spaceship%20crew%20positions', suggesting a lure to a phishing or scam website. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffset.ru/wb?keyword=spaceship%20crew%20positions PDF link annotation
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/gekoxuvizobuvewil.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WZ1R4oM/dilepajesezodajugulivuno.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/Gctif2h/hocus_pocus_25th_anniversary_halloween_bash_watch_online.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/lobifuvawova-relen-zeralinul.pdfIn PDF document text
    • https://cdn.sqhk.co/dasoxitif/XjigiTf/jumevafusuti.pdfIn PDF document text
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/bilodeleboj.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/hdvUdl8/mechanical_engineering_jobs_san_diego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc506f6-a83b-4e6c-b75d-6511b847e07e/fokowowuvupotudukezefu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/81415772514.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/mifaveveze.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/wupegunuluzixo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 3104 bytes
SHA-256: 8560ac22be4b45f3e93e75eb15449af543e8f43bcd41c109bb623b8f3b1f5147
font_01_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 5184 bytes
SHA-256: 37521374f2a21155a9983641233fa5836dc6eb05a0f928264287620f5acb6655
font_02_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 11920 bytes
SHA-256: f1089fedff3cd792fc64db7c94919f39604f0b05d649ad0d68e579147b809481

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