Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae0f682f643bb37…

MALICIOUS

PDF

119.7 KB Created: 2020-11-08 10:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3201c842e70c7d1cee24a741cc79f271 SHA-1: 94f4b2667f389050760e0d15dea9048a592d07fe SHA-256: 5ae0f682f643bb3740a96c4a8d821d3661ef922fd1e783d6287247ab8f6ad3dc
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a heuristic indicating it is part of an advance-fee scam and an MFA lure, suggesting credential harvesting or financial fraud. It also contains a large number of external links, many of which point to other PDF files, forming a link farm. The primary malicious URL identified is https://traffset.ru/123?keyword=android+hacked+apk+games, which appears to be a gateway to this network of documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/123?keyword=android+hacked+apk+games PDF link annotation
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/0f6636.pdfIn PDF document text
    • https://sowuwiwegekop.weebly.com/uploads/1/3/4/4/134444151/gapevowinokunuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://basulirezono.files.wordpress.com/2020/11/pamowegivodonofonovesom.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/an_echo_sonnet_to_an_empty_page.pdfIn PDF document text
    • https://vinutolaxuw.files.wordpress.com/2020/11/81713979980.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/nijemusejewuwejox.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/radiant_raiment_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e2b424-c7a3-473f-9446-338c491c2906/nerab.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bizexuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/jupeluki.pdfIn PDF document text
    • https://zawexukaral.files.wordpress.com/2020/11/jikatepal.pdfIn PDF document text
    • https://voxovud.files.wordpress.com/2020/11/zipufovojagovumuruduxixe.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_off00019915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19915 5508 bytes
SHA-256: 418631ea997c62a6b732ce3e9cf6cb5db998aff191237eafbded46d5946df265
font_01_sfnt_off0001aba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABA4 11320 bytes
SHA-256: 254149726f1973ee1fda2b8ce9378e7489e3a39eefc5b92ed1e785fbfded3e16

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