Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a28141510c13ba…

MALICIOUS

PDF

89.2 KB Created: 2020-12-31 04:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73b4bee0dcc7ca8346a555d3e0ed62c SHA-1: 84c1e591022892389e8e9a7688cdcaaff6e87f29 SHA-256: 94a28141510c13ba3ad422ff42bec0013b8e9832b98e9961d808f8b81001bb3e
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, leveraging lures related to prizes, parcels, and large sums of money. The presence of a mass external PDF link farm, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of further malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=pittsburgh+arts+festival+food+trucks
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/bokizeleg.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/2710254.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fadec0c5197c.pdf
    • https://jiluzeros.weebly.com/uploads/1/3/4/3/134365673/dizosusiw_mabelelok_tilavenifon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c4ae945-e58b-44e4-b9b4-0e39b757e93f/benebiwubiguwetob.pdf
    • https://uploads.strikinglycdn.com/files/855a2a28-cd04-4042-96f2-11bf34305924/valajumejemi.pdf
    • https://uploads.strikinglycdn.com/files/b07c2008-4226-4936-bf5b-466391a7d3e2/leloji.pdf
    • https://uploads.strikinglycdn.com/files/9d0f2a1b-38fd-4f59-9e26-b535c9ff332f/tosadizekepumig.pdf
    • https://uploads.strikinglycdn.com/files/68f09fbd-cbc2-4cb0-a053-8479709ae01c/xumipofu.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_off00011fe0.bin
c4a78e16039d709c96b667ab8f6efc6fb1a6ea116b3674ac3df7ce64a12f302e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE0 5548 bytes
font_01_sfnt_off000132c4.bin
7381b326cb98f9bbfb48bc609da15b05a05121dceb52932dc15401b1f06702ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 10864 bytes

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