Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6d660f17e089f8…

MALICIOUS

PDF

69.6 KB Created: 2020-12-24 20:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f7048c7285756b38108d74f854b36fd SHA-1: efd6e0f595c812d31240fc7581e6090c1def14b7 SHA-256: 3a6d660f17e089f838f217e879cd3c2ee9377b61bdc03832ddf176c09bd4b01c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm' heuristic, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, 'https://trafffe.ru/123?utm_term=access+bank+azerbaijan+capital', suggests a phishing attempt related to banking information. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=access+bank+azerbaijan+capital PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5fa3ba899b0cd.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/bxib3WW/heroes_of_hammerwatch_light_puzzle_solver.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/Dh1dhif/western_hero_redemption_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5fbbca47b06d4.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_5fda9242a48e8.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/91bd3e906df.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/putef_gakibo_midikipafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f8b2c8f8cb91.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/839a6e3f-58c2-4c06-ba21-b89261e7497d/masterpiece_counseling_adrian_michig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12A 5248 bytes
SHA-256: 38b1c1b9cdc26cff6d810b80df68a8de5c1503a88217642f9d16fbb2a1257af2
font_01_sfnt_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 12088 bytes
SHA-256: 0423dad789eb7f2f66c8b9ed57574f7af7eb673c442230364bcf68c370d39ef0