Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f6045590ba6e94…

MALICIOUS

PDF

73.3 KB Created: 2021-01-04 00:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5d71e8a0ffabb8c2859acb703b36a7db SHA-1: c2bd0a783a55a05e07f0b9b2ff154855d76dcb55 SHA-256: 20f6045590ba6e9413fe9bd60df8e4a02948434529e177f0e9406c5d26c79b43
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being traffset.ru. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. The document's structure and embedded links suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=employee+satisfaction+survey+report+template PDF link annotation
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/6034506.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/6ad17ae3f105906.pdfIn PDF document text
    • https://xujajogasugoni.weebly.com/uploads/1/3/4/5/134514057/dd1196e81a.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jh12Gja/43204802371.pdfIn PDF document text
    • https://zazafiwizodizi.weebly.com/uploads/1/3/4/0/134041258/nogezinopuse-lomokugojiwaz.pdfIn PDF document text
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/7132345.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/1619920.pdfIn PDF document text
    • https://cdn.sqhk.co/xabiximakef/hgjaje3/xufefawemuwijukopuxaxinul.pdfIn PDF document text
    • https://zunotebizi.weebly.com/uploads/1/3/4/6/134648513/jozabemomewo-lopelasula-gelasisodu-xadurikufor.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/damerirazib/chalo_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/xazomufiwarosuwodoxatonib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19fcba6-d422-456a-aa57-5e903170e3a0/risafusita.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/masegixi.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/nazudu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 5280 bytes
SHA-256: 70f651cd8f18c84b7fec0edc64624f04908f119f3bd9ad96b6de9dc17cc0803d
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 10656 bytes
SHA-256: 60bdd4d9553babbce1ddea6c6528cacdda57b15fffd90f90565299eade721ed0

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