Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed45146659cfd36…

MALICIOUS

PDF

65.5 KB Created: 2020-11-10 19:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3efaaea3623b76b19c3356af50f5920c SHA-1: 272d281c9361b91971843ef50222ab5434416a21 SHA-256: bed45146659cfd366eb91fe39df91222f5f35217302bff95a2cc43dedeba1778
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attempt, possibly leveraging PDF vulnerabilities or social engineering.

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://trafficel.ru/aws?keyword=third+person+objective+narrative PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f8893eb0e4f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5f9605831b8f6.pdfIn PDF document text
    • https://jopekaraxawil.weebly.com/uploads/1/3/4/5/134589640/keganobazig_nazorag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f92c6bf9b425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5fa4a3647e29a.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.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/jasadavebaga/rajuxudarodofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091df1b2-d13a-4b2b-ab22-e0be31084753/34037173612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf3df8d-784e-426c-a5ae-e141a8c89306/zejuxuga.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/6706177680.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/77389752305.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/breaking_benjamin_aurora_dance_with_the_devil.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/78628925670.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_off0000c627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC627 5356 bytes
SHA-256: e068ef85006f6be54c69f2beb7022052811a88525b28655f45dc212e8d59aa55
font_01_sfnt_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 9736 bytes
SHA-256: 83a1e2b5d585798d3cfe2c14be06aff2e5e6c2a5a338166d9f3bae0bab91d9bb

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