Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b381845f97a8e1f…

MALICIOUS

PDF

38.0 KB Authoring application: LibreOffice Draw
MD5: 899804793c69ad3148d354c15a1df7e7 SHA-1: cd4ba6c7aa8d09eac14d5708b73f44071dac1507 SHA-256: 5b381845f97a8e1f789a89be1aeb60ec7040fff5417b6c6608e12836c7f5d919
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting a critical heuristic for a large external PDF link farm. The embedded URLs likely serve as a redirection mechanism or a method to distribute further malicious content. While no scripts were explicitly extracted, the nature of the link farm suggests a phishing or SEO poisoning attack vector.

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://youthpolicyfoundation.com/uploads/1/3/0/6/130621950/dc655.pdf
    • http://mrbphoto.weebly.com/uploads/1/3/0/4/130435960/da6db253323f23b.pdf
    • http://wasini.mammoth24.com/uploads/2020/01/28/fudomajixapavomeg.pdf
    • http://dptrackandfield.weebly.com/uploads/1/3/0/6/130621865/8856486.pdf
    • https://binofevewulefi.weebly.com/uploads/1/3/0/2/130287920/4381239.pdf
    • https://sipovavanapakin.weebly.com/uploads/1/3/0/5/130543353/dakab_jizuwog_nevixifa_fegisuxaxa.pdf
    • http://niyati-plongee.com/uploads/1/3/0/6/130621918/jotiwuredananos.pdf
    • http://efwpartners.com/uploads/1/3/0/2/130287886/mosawalijixulow_rosuvuv.pdf
    • http://kaktus.fun/uploads/2020/01/27/9559119.pdf
    • http://underlordspro.ru/uploads/2020/01/27/valolizilituvujuliw.pdf
    • http://nekimastrategy.com/uploads/1/3/0/5/130543019/5885043.pdf
    • http://washandshine.net/uploads/1/3/0/6/130621106/2936953.pdf
    • http://luchalibrevive.com/uploads/1/3/0/5/130550682/e20ed8979089e29.pdf
    • http://oelectrike.ru/uploads/2020/01/27/xedelavutez.pdf
    • http://kurdistantours.net/uploads/1/3/0/5/130543837/e57b3.pdf
    • http://beingself-centered.com/uploads/1/3/0/2/130289669/130289669.html#chinese+new+year+holiday+2020+calendar

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013f2.bin
085e8c2546174fc4ecbae29ae034fe47baf366419a4dc6f50f4da72abc2f0585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2 7896 bytes

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