Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbb1773a088e458…

MALICIOUS

PDF

68.0 KB Created: 2020-12-15 06:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 40e644b44d4f8762107949721e07f042 SHA-1: 1bf2b3d73a4acf256212bd333f35378dce35eecd SHA-256: 4cbb1773a088e45850a491bd43ede9b54f90290d7ee54cf24523f812c32a66e0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier flagging it as a phishing trojan. It contains a large number of external links, indicating a link farm or SEO spamming activity. The primary URL, https://trafffi.ru/123, suggests a lure related to cremation jewelry, which is likely a deceptive tactic to drive traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=sterling+silver+cremation+jewellery+uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fcd44f521882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f8f2fe1b87ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_5f9bac7155960.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/3c30e9ffd729.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/83d330064001.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/dajure.pdfIn PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/tuxodor-fisiko.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/1079435.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/912726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366339/normal_5fcd071e69623.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf526561e25426e12f5600/1606373995260/jojiku.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce898d10aaab49c8e20a77/t/5fd1aac2fec2791e31046cc5/1607576259925/pagugaxozifojevufas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5156917e7202640050e05/t/5fcf4c2901eaf4591e268856/1607420970513/47934832987.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69cd5bda9c57a97e5d88e/t/5fd64bba9264095525d08f2b/1607879610581/324312007.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/winky_d_album_gombwe.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_off0000ca44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 5616 bytes
SHA-256: 3269bb3c8682baeb60770f7e94f545ef001cadf4f4a8664db8684c48f3ee0f9b
font_01_sfnt_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 10432 bytes
SHA-256: 024165bd98ef6cf623f492f331986fd75fb35cc6eeabda06bb9eca6d77b56272

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