Malicious PDF — malware analysis report

Static analysis result for SHA-256 b602f0094eba68a8…

MALICIOUS

PDF

84.0 KB Created: 2020-11-11 21:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 918ee06576bc0a6e320acd6c6764d4ca SHA-1: 16dec28c4c227307c342902a2b8ff18562019220 SHA-256: b602f0094eba68a899477e00c3dff1ec28fc385376ef319045e2c7d966259184
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=alcatel+pixi+4+8063+firmware PDF link annotation
    • https://kuxunudizovisaj.weebly.com/uploads/1/3/4/3/134321976/5044828.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/joriz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f9edb6830f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8f68ea4753e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f8f1d8499aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_5f95fc2f74d21.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/2861442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5faaeed52ae17.pdfIn PDF document text
    • https://zebatezovas.weebly.com/uploads/1/3/4/6/134618099/fofesuzipofela.pdfIn PDF document text
    • https://bowonusafepa.weebly.com/uploads/1/3/4/3/134319531/lutuzasejorado.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/vemegarobema-xinexolo-gavegomavaxovow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4d732b4c-7956-4ad9-bc26-d52b06f0bdb6/bisafuliwizasiriwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce82fb9c-f0a8-4a6c-a4c6-afbd5f2d8b1c/kutomibubeketomu.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_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 5448 bytes
SHA-256: f4c55c0aaa2229b69eece84d5b61f0cb0e97a21737fb7732db2d71e3c9e20cfa
font_01_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 10668 bytes
SHA-256: a10ebe69922c29b54331a3528adfcabd42165dbc70d721632cc9e2b06499967d
font_02_sfnt_off000134ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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