Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4e1c1080bdb2cc…

MALICIOUS

PDF

37.9 KB Authoring application: Pdftk
MD5: 053a16de44d313d87c0336a1d9280af0 SHA-1: bc7c6bac33df845d3c8d48a4b7af794e55f2b159 SHA-256: 7b4e1c1080bdb2ccfa0406cbd44519cb0198ee15333220c3045bab949293c6da
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. This suggests a phishing or SEO poisoning attack. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of the specific lure.

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://www.browniesdiving.com/uploads/1/3/0/6/130604949/tisarifawezosez-wimimo-sovowinem-setavilalod.pdf
    • http://myforexleague.com/uploads/1/3/0/6/130621673/94a17196b1fb.pdf
    • http://christopherandnatalie.com/uploads/1/3/0/3/130323462/4ba37ceeb47.pdf
    • http://sawdustsisters.net/uploads/1/3/0/2/130288557/20336.pdf
    • http://tokyobeginnersleage.com/uploads/1/3/0/4/130493968/1687907.pdf
    • http://kswinehk.com/uploads/1/3/0/2/130289493/nonevexur.pdf
    • http://llacesofficial.com/uploads/1/3/0/7/130739524/vatotubure.pdf
    • http://untabvel.store/uploads/1/3/0/8/130873709/140a4e9c0.pdf
    • http://www.mrjudd.com/uploads/1/3/0/2/130289549/653330.pdf
    • http://crazycraftcubby.com/uploads/1/3/0/2/130273798/fbb0e8ac08b.pdf
    • http://vtt-ebike.com/uploads/1/3/0/6/130639714/4735953.pdf
    • http://fimailbox.com/uploads/1/3/0/7/130775775/64890b.pdf
    • http://www.docartgallery.com/uploads/1/3/0/6/130640229/kapezo-bokivegep-sejapot.pdf
    • http://zincmsp.com/uploads/1/3/0/7/130776054/dc63b49.pdf
    • http://www.amurny.com/uploads/1/3/0/7/130738973/65f3a.pdf
    • http://billyxmas.com/uploads/1/3/0/6/130620659/7532254.pdf
    • http://mirandapueyo.com/uploads/1/3/0/2/130273983/0afa4b743989.pdf
    • http://endpovertyinelgin.com/uploads/1/3/0/5/130590336/rulutunasubanafe.pdf
    • http://www.paradisepictures.com.au/uploads/1/3/0/3/130323415/7780374.pdf
    • http://www.spacecreationdesign.com/uploads/1/3/0/2/130289387/130289387.html#acute+tubular+necrosis+definition

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003525.bin
b1d228cffb3b230419b7f114c6977e9bb379500dbfa1d7c36af113fb6ea056c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3525 8212 bytes

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