Malicious PDF — malware analysis report

Static analysis result for SHA-256 3623ab542955e31d…

MALICIOUS

PDF

44.3 KB Authoring application: LibreOffice Draw
MD5: 116afbf6db74befdf4fb6a7f6487a978 SHA-1: 58ca33d99039f4a145093d4ecb128f9e106d92d8 SHA-256: 3623ab542955e31d706f7ca9f506fbe27c34662943572e57c935ef488d54bd75
150 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 pointing to external PDF files hosted on various domains. This technique is commonly used for SEO poisoning to drive traffic to malicious sites or to host phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

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://birminghamobediencetrainingclub.com/uploads/1/3/0/8/130813837/d837e4084.pdf
    • http://seniorresourcesummit.com/uploads/1/3/0/5/130588434/xijigowedeg-motizijuw.pdf
    • http://starwarsnerfs.com/uploads/1/3/0/5/130544191/kesepimunumij.pdf
    • http://www.ilpetit.com/uploads/1/3/0/4/130476237/93faa5d5cfd.pdf
    • http://mail.kendraswiley.com/uploads/1/3/0/5/130541402/dobenen.pdf
    • http://cds-ma.net/uploads/1/3/0/3/130379561/74142d07d455.pdf
    • http://rvrepairarizona.com/uploads/1/3/0/6/130621503/dutifetovune.pdf
    • http://www.badcathalloween.com/uploads/1/3/0/2/130289494/sisosanuvonoxer.pdf
    • http://openarmsbanduk.com/uploads/1/3/0/2/130287943/415004.pdf
    • http://girlcreeture.com/uploads/1/3/0/5/130539170/8888e16d04.pdf
    • http://magna-core.net/uploads/1/3/0/5/130588698/soxuv.pdf
    • http://guardioesdeluz.com/uploads/1/3/0/4/130483924/3734458.pdf
    • http://newbraunfelsanimalhospital.com/uploads/1/3/0/8/130874163/guwulinukepisaluvoro.pdf
    • http://pricewaterhousecoopers.us/uploads/1/3/0/5/130550967/1248075.pdf
    • http://www.2lookphotography.com/uploads/1/3/0/2/130289171/vunatezisuga-zawoxol.pdf
    • http://2daycashoffer.com/uploads/1/3/0/5/130551179/6617219.pdf
    • http://lamee-dark-version3-de.devsite-1.com/uploads/1/3/0/9/130969915/130969915.html#short+notes+on+medieval+indian+history+pdf
    • http://starwarsne

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000038e9.bin
bafa6002cda0b368ea1258813de9199d82c2518be25862a3af736bac73539f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38E9 16132 bytes
font_01_sfnt_off000050af.bin
b33f200bc81aceb07ef46093ed0173a209f580e60e08cd71d89ea85bbcb978a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AF 8216 bytes

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