Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c558bc268323d24…

MALICIOUS

PDF

44.0 KB Authoring application: GIMP
MD5: 8f54ef51cf142225b64ea7737ef8f6be SHA-1: 79c43cc863352b7862441c09b735a9f819846fbe SHA-256: 0c558bc268323d24b68b98500b73ed5afacc317394d68f38f74cbd5c3670f642
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the presence of numerous external links suggests a potential for downloading and executing second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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-7963575-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7963575-0
  • 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://sekworks.com/uploads/1/3/0/5/130547689/2207d1cf2b2.pdf
    • http://lipstickliberalnetwork.net/uploads/1/3/0/5/130588157/5610606.pdf
    • http://atmdye.com/uploads/1/3/0/6/130621785/fazemudijixeduvevu.pdf
    • http://taylorcountydemocraticparty.com/uploads/1/3/0/6/130604181/0e88e868e8.pdf
    • http://mzansinewsonline.com/uploads/1/3/0/6/130620989/jaripeluv_teralo_xexen.pdf
    • http://www.visitwhidbey.us/uploads/1/3/0/7/130738890/dezenavaramobazu.pdf
    • http://mossellsworth.com/uploads/1/3/0/4/130476485/5422572.pdf
    • http://stratfordholidaylets.net/uploads/1/3/0/6/130620530/jusilumudelip.pdf
    • http://mail.jvgfotografie.nl/uploads/1/3/0/5/130550785/459bcb3d138f2.pdf
    • http://naukajazdywroclaw.com.pl/uploads/1/3/0/6/130639588/gavito_derimalesanod_suzofaxibibo.pdf
    • http://pagangarden.com/uploads/1/3/0/2/130272254/mitiregamulowipe.pdf
    • http://autodiscover.oversightconsult.com/uploads/1/3/0/5/130551922/4704053.pdf
    • http://host175.carmichaelnl.com/uploads/1/3/0/5/130588772/130588772.html#global+iodine+deficiency+disorders+prevention+day+in+hindi

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005316.bin
bd71d6efde10664b4745c1738ddf81f716565eaf8ef3388863e06cc2d67f7fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5316 8432 bytes

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