Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc169594879321ea…

MALICIOUS

PDF

72.8 KB Created: 2021-01-05 21:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6f85b4162a343c41fda04b79a5f3d885 SHA-1: 36f7d2f26b5c17c286fed76cb3a50b74dabae5a7 SHA-256: cc169594879321ea5f45bbca1ff40d2c27f5dd4ff372736c457b7d5331b9be60
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirectors, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=saint+philomena+church+information+in+kannada In PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/siresa_likabedomixulus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_5fc407184e1be.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/novobomapef.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/relamotorug-levokika.pdfIn PDF document text
    • https://powedumino.weebly.com/uploads/1/3/4/3/134350182/dagasato-vavawezex-filas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5ff1593986ba5.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/d3296423f9.pdfIn PDF document text
    • https://karubidodofibe.weebly.com/uploads/1/3/4/3/134316277/nevirok.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/sojuravewi/vuxelowupo.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/babemumenodefososutudilof.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/64540751041.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/bilupukukawuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4def9ad2-619a-45f2-b74e-cef4e419be86/nigegojuxipujigesezaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83dcd8c5-2be0-49ec-824d-c4445eafaa4e/xuwoluvebifofe.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_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 5384 bytes
SHA-256: f5e6de8737ad95e1fea78b08d2c5514b618c103cb382eebf12c1d3449dd4f371
font_01_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 10288 bytes
SHA-256: a923694d29264fc0576093e3ebd70451e7522daba8a41e31a0244e3ee5cacbcd

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