Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6c18e7c2b23157…

MALICIOUS

PDF

75.8 KB Created: 2021-01-11 18:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 90c2bf616bd4becb91972deac79b92fc SHA-1: 9d7af90a149ae1a0adb86d6f4d1bc3ff3ac16aaa SHA-256: 2d6c18e7c2b231578d6a731daba90faf498ca2d8a7d09b408b2c133621c3d755
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure suggests a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?utm_term=fit+over+50 PDF link annotation
    • https://cdn.sqhk.co/boketumejipa/diahjTD/23024386470.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/6EgdlVL/youtube_tom_waits_my_piano_has_been_drinking.pdfIn PDF document text
    • https://site-1168494.mozfiles.com/files/1168494/27907963119.pdfIn PDF document text
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/6431616.pdfIn PDF document text
    • https://netiwixavono.weebly.com/uploads/1/3/4/3/134306625/kiwiwojaxadif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fc6b59ed9a4e.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/hHhdxii/wagodomimumebumuzokilak.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/ifejigd/41015448872.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/egevL42/fidigupavafav.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/2314308.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/6820042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_5fb3fefc7a5c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/gta_3_cheats_codes_apk.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_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 4540 bytes
SHA-256: 067bad1d9696923f89791e8e6b97d045c6140499516c7c9eeaeaa0841ddd3448
font_01_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 9924 bytes
SHA-256: 2f6f157fb2f738401e40ac818ac7a16d7a13bdf212e3df6ea6be11d94a6c4ae3

Open this report in the interactive analyzer, or submit your own file for analysis.