Malicious PDF — malware analysis report

Static analysis result for SHA-256 949569e454a043bb…

MALICIOUS

PDF

35.9 KB Authoring application: QPDF
MD5: 2031990a58ba3ed9535e306e3cb57153 SHA-1: 7f358097bcbe2c12f9f18202e7d8cddf9a2ff50e SHA-256: 949569e454a043bbfdc8a84b80e8ae9ede6f414fd83098e4b91783632e7a6ef2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs pointing to other PDF files, indicative of a link farm or SEO poisoning attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or phishing sites. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact 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://mh-aero.de/uploads/1/3/0/6/130604434/7672381.pdf
    • http://legendsofnigeriabasketball.org/uploads/1/3/0/3/130379254/20bbe77580.pdf
    • http://www.esotericindiepubs.com/uploads/1/3/0/6/130621387/toxusezunise.pdf
    • http://centralemag.com/uploads/1/3/0/6/130605263/mumes.pdf
    • http://education-innovations.org/uploads/1/3/0/2/130287513/7983810.pdf
    • http://northernillinoispainting.com/uploads/1/3/0/3/130323190/sulepivafupanufidusa.pdf
    • http://harmonyhypnosiscenter.com/uploads/1/3/0/8/130873801/sumalugofil.pdf
    • http://myseward.com/uploads/1/3/0/4/130476427/bezemakova.pdf
    • http://jlonan.com/uploads/1/3/0/6/130640123/ea16d426cb5f.pdf
    • http://rivercitymoto.com/uploads/1/3/0/4/130483634/7599927.pdf
    • http://madelinerhodes.com/uploads/1/3/0/6/130605028/sitowu-judemejosulut-zanutugaxopazi-mopanedusezado.pdf
    • http://konect2us.com/uploads/1/3/0/5/130544086/395507.pdf
    • http://talknique.com/uploads/1/3/0/6/130604042/jesenop_fiwaduwukedifi_lanurojumunot.pdf
    • http://precominc.com/uploads/1/3/0/6/130639700/f2ee3f4bc14779.pdf
    • http://shiying-cheng.com/uploads/1/3/0/7/130776887/130776887.html#airdrop+imovie+mac+to+ipad

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f6.bin
2a57817e0bd2d092f2a34d6f3f3a5a78af3d5a3a77a5c497c597b6f18852068c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6 8156 bytes

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