Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe7bf4cf187b9ed…

MALICIOUS

PDF

45.3 KB Created: 2020-04-04 07:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 299c0c3b246cdbd3eb7542b067a37541 SHA-1: ad25466bb39c66932c478e335b52a0ce9a215ba0 SHA-256: efe7bf4cf187b9ede5478d1c1f50ec4edbdf28c18a0a85d81f5a77ea040ae30f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV (Pdf.Dropper.Agent-9033079-0) and flagged by an ML classifier. The document contains a large number of external links pointing to various PDF files hosted on different domains, indicating a link farm or SEO manipulation tactic. The primary purpose appears to be directing users to these external resources, which could host further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.Dropper.Agent-9033079-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9033079-0
  • 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 http://incipitpress.com/uploads/1/3/0/3/130324315/130324315.html#long+live+the+emperor+corregidor
    • http://priyabery.com/uploads/1/3/1/3/131383207/xuwozipiv_lofalesafizefof_koxavomamibod_pafid.pdf
    • http://luxuryhomehk.com/uploads/1/3/0/2/130272101/firufez.pdf
    • http://coachingstartup.net/uploads/1/3/0/5/130546183/da18214d.pdf
    • http://puppettearspod.com/uploads/1/3/0/6/130604737/doguvudakowujemosi.pdf
    • http://auralashstudio.com/uploads/1/3/0/2/130288402/wodapu.pdf
    • http://deeshasdesign.com/uploads/1/3/0/3/130323968/9485095.pdf
    • http://channellingsocrates.com/uploads/1/3/0/5/130588346/66a6e86.pdf
    • http://whatdoyoureallywant.org/uploads/1/3/0/2/130291592/nopakemu.pdf
    • http://exchangehousetravel.com/uploads/1/3/0/2/130272592/1383440.pdf
    • http://myinspirationspace.com/uploads/1/3/0/8/130874156/gotupet-zatazidegox-kemidaruze-jolizanan.pdf
    • http://anchornewshub.com/uploads/1/3/0/7/130740262/b43d913.pdf
    • http://divinebathboutique.com/uploads/1/3/0/8/130814966/2266693.pdf
    • http://palmistedor.org/uploads/1/3/1/4/131452997/1551357.pdf
    • http://toprealestateagentlasvegas.com/uploads/1/3/0/2/130288802/nerokitori_mevuwu_vifonulafewas.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008709.bin
bb86851443974f02b2af07e544bdcfa63d2514079945797128dbd9bb1fa5f239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8709 8132 bytes

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