Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bf3f08ba229395…

MALICIOUS

PDF

31.9 KB Authoring application: Poppler-utils First seen: 2020-09-24
MD5: 4d99e9d603d715e5d80104296309471b SHA-1: a50a9f239ee4460c26f0af24d6101d9501229e3d SHA-256: 81bf3f08ba229395b587344bde53a202c57014acc66c322a5b3252aa4cc9eb5a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, identified as a link farm, which is a common technique for distributing malware or redirecting users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or downloader variant. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://rockinroosdjservice.com/uploads/1/3/0/6/130621033/wavupirojofigapa.pdf In PDF document text
    • http://baretodo.difmed.com/uploads/2020/01/27/rojuz.pdfIn PDF document text
    • http://fegefi.dedietrich-outlet.ru/uploads/2020/01/28/2062675.pdfIn PDF document text
    • http://greencoconutmarketing.com/uploads/1/3/0/2/130287937/8862401.pdfIn PDF document text
    • http://golufozox.qazaqkuresi.com/uploads/2020/01/29/978beb5aa0a.pdfIn PDF document text
    • http://thedianavargas.com/uploads/1/3/0/4/130483146/2511127.pdfIn PDF document text
    • https://tivipogux.weebly.com/uploads/1/3/0/5/130544413/dozakez-xekowuwenumagu-firedese.pdfIn PDF document text
    • http://kopunaluvo.ekzolocin-ot-gribka.pro/uploads/2020/01/27/lajijaxifugogo.pdfIn PDF document text
    • http://berryflats.net/uploads/1/3/0/5/130547999/d2a2e503.pdfIn PDF document text
    • http://candeelandproductions.com/uploads/1/3/0/5/130540824/jobevenilikoputuse.pdfIn PDF document text
    • http://gawem.myaccount-solution.net/uploads/2020/01/27/1d83b4ae9b.pdfIn PDF document text
    • http://nodamineg.vitevendu.net/uploads/2020/01/27/d91a25d57f62.pdfIn PDF document text
    • http://evokefitness.net/uploads/1/3/0/4/130435619/130435619.html#baixar+hack+whatsapp+ultra+v+1.5In PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7 7912 bytes
SHA-256: 153dad7b538f403ced99a247f69d932c2e20ee2c5cbfc3d57c1b1b8c62915980

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