Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedc5895c1a10fc8…

MALICIOUS

PDF

34.2 KB Authoring application: LibreOffice Draw
MD5: ec2f978a52863accadd34ff474f70f57 SHA-1: fb529b073f485fa1a2fd7eccf8acb5559f0ff619 SHA-256: cedc5895c1a10fc8d8feb55994e36c048c0f32aea7dafbf0d4e782f95ba735d2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly support the malicious nature of this file. The document body itself is heavily obfuscated and does not provide clear user-facing text, but the presence of numerous external links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://animators.directory/uploads/1/3/0/6/130621995/punetifuzowafi.pdf
    • http://balsamrootcatering.com/uploads/1/3/0/8/130874244/bolen.pdf
    • http://www.allergybookmom.com/uploads/1/3/0/7/130739437/7162099.pdf
    • http://speakeasyliverpool.co.uk/uploads/1/3/0/6/130620501/1577332.pdf
    • http://pocdogs.org/uploads/1/3/0/5/130589137/9679069.pdf
    • http://newrichmondoh.org/uploads/1/3/0/7/130740264/dezarawozefisi.pdf
    • http://peterstownshipgolf.org/uploads/1/3/0/7/130740003/d437a1c0fa86.pdf
    • http://www.thebloominary.com/uploads/1/3/0/5/130551654/3232e5.pdf
    • http://miseniorcenters.com/uploads/1/3/0/6/130639853/0686c6bffc94.pdf
    • http://kbweeblycomdomain-registrarhtml.com/uploads/1/3/0/5/130589219/vumilom.pdf
    • http://infusionsafety.com/uploads/1/3/0/5/130588700/tuxatonalusabazejik.pdf
    • http://directorsofficersliabilityinsurance.wales/uploads/1/3/0/4/130435870/130435870.html#download+jurnal+pendidikan+islam+pdf
    • http://pocdogs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fbc.bin
7c0ca73b0e820eca81d790b1e86304ca64d46f5a7433780380be42c09eaec751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBC 7484 bytes

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