Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab110dbb03829c75…

MALICIOUS

PDF

66.0 KB Created: 2020-11-28 10:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30167099dd55b38688cf86fe1fa0a5ec SHA-1: 7964c7a2d4d9b60f0edd0845f677ef86ac2c75e4 SHA-256: ab110dbb03829c750bc14f4540cccc439e633d5fe9d325ecf69731150201b4e7
222 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic for a link farm suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/aws?utm_term=avira+antivirus+free+trial+90+days
    • https://cdn-cms.f-static.net/uploads/4453100/normal_5fb4dca83bf9c.pdf
    • https://kizofupotumi.weebly.com/uploads/1/3/4/3/134314367/dazenesabodexagonej.pdf
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fb8a1a701ab2.pdf
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/5882949.pdf
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/mukefutajexul.pdf
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8935e35667b.pdf
    • https://cdn-cms.f-static.net/uploads/4426087/normal_5f9f00c433716.pdf
    • https://sevakozo.weebly.com/uploads/1/3/4/6/134677934/gejetadeleguku-kawexuxivinana.pdf
    • https://xibotizumeg.weebly.com/uploads/1/3/4/8/134865631/kafazar-tonisuwalup-zezavurufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/797dd101-a1ca-40ba-8f2f-415256233012/mupumevalafoxiluwegaja.pdf
    • https://uploads.strikinglycdn.com/files/69d5aa12-8c64-451b-a5c3-e0afdb77a648/que_es_apk.pdf
    • https://uploads.strikinglycdn.com/files/b1f2c9ce-3a70-43ea-a74c-8cafebe97ee2/38527208679.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_off0000c49c.bin
038702161c3abb46469a3007a646b663c3ec0b7222c8be62d95c2bdade32f737		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC49C 5352 bytes
font_01_sfnt_off0000d6e6.bin
00a7131bbe83cb774cbf0d26b86a4650fb858ee302105912a18daa06e03aada9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 10712 bytes

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