Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f570e7244c46461…

MALICIOUS

PDF

76.0 KB Created: 2020-11-18 09:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a3cca10e6b9c0dde4cf3f31f508e7b4c SHA-1: 25749274e74467c50114d0b24cb6b1626b036c90 SHA-256: 6f570e7244c464613a88032c6392fbd93fa5231b23b7184b4610e2f69b30f678
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing lure disguised as a product description.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=memory+foam+crib+mattress+pad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5fb26661ab979.pdfIn PDF document text
    • https://bozalugim.weebly.com/uploads/1/3/4/3/134343660/xasagoboralader.pdfIn PDF document text
    • https://tulalezosisab.weebly.com/uploads/1/3/4/6/134601470/rerix.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/tesodagiwor/2873713557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1a8181-7a5b-4e61-902f-310590cc2a38/sunopufedesoxiso.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/50482370308.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/salon_enlightenment_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0488354-37fc-4b13-8540-b2a0b012075e/alicia_keys_discography_download.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/best_self_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe7047e-316e-4858-9def-e0871508f646/how_to_make_tempered_glass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eabd381-71ef-4ede-a414-f7f374682442/90871881130.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/79409553717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e5a04c-0102-421b-8a18-f04215767712/47156779717.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/widimebogazogabetiwipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51fc787-2183-499f-bedb-8408361107d8/gegose.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_off0000e8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 5516 bytes
SHA-256: 78513977d613d723a72decbb3cf34658474b330ad38d48fd37c879265fbd01f7
font_01_sfnt_off0000fb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 11144 bytes
SHA-256: 70d2fdb8b9abd3f20ad8660ced5f2e01d9b5e5e4632e09ea0cded0f7605d7826

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