Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfe081f45e5c86…

MALICIOUS

PDF

41.1 KB Authoring application: Inkscape
MD5: 16a87a45954f7c1ded7c25ac11d622df SHA-1: 58dca83401ec65bc14a833266136ee26793f4cee SHA-256: 7ecfe081f45e5c86519b1b6d1d721559c509b6e0b54e1f42b7424f82668da8b0
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, a technique commonly used in SEO link farms for malicious purposes. The document body, while containing technical jargon, also embeds these malicious URLs, suggesting an attempt to trick users into downloading further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cneachome.com/uploads/1/3/0/2/130291485/binifig-wekija-tupesomofiva-bovixale.pdf
    • http://artfulbeingfineart.com/uploads/1/3/0/3/130323601/4603989.pdf
    • http://rolloffdumpsterrentalsanantonio.com/uploads/1/3/0/5/130588318/488216603cf.pdf
    • http://newhorizonsllchardwoodscustomprofiles.com/uploads/1/3/0/6/130604168/b190a496c94.pdf
    • http://nikkosbread.com/uploads/1/3/0/6/130621507/takagokubosajekojif.pdf
    • http://nesog.1-gc.org/uploads/2020/01/27/zemok_vijamizi_xagenuxawuxip.pdf
    • http://merkabaonecollection.com/uploads/1/3/0/7/130775413/795390.pdf
    • https://xetumabex.weebly.com/uploads/1/3/0/4/130476589/vutevusunubenisuw.pdf
    • http://elmiloveyou.com/uploads/1/3/0/2/130272619/02a0d9766b6.pdf
    • http://cyclebavaria.com/uploads/1/3/0/6/130605291/130605291.html#cyclohexene+to+adipic+acid+theoretical+yield
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000127d.bin
e73ad61bef0abffa6c53a7489e24c0ab5dc6a245ddcdd29dc7605077ad35f748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D 7904 bytes
font_01_sfnt_off0000657a.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 2652 bytes

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