Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e355d07649d26c…

MALICIOUS

PDF

33.1 KB Authoring application: Smallpdf Desktop
MD5: c940636bd1c5413cefc84776d6ca11d0 SHA-1: 4a5a4c2197f9d940c78dc2124ed3fbf8756b6f36 SHA-256: 12e355d07649d26c251eb3f721c8a8eea1e9f916a13bf98dff3919f59a7abaec
152 Risk Score

Malware Insights

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

The PDF document contains a mass of external links disguised as a scanner manual, aiming to trick users into downloading further malicious content. The heuristic 'PDF_SEO_LINK_FARM' and the numerous unknown-reputation URLs strongly indicate a phishing or malware distribution scheme. No scripts were extracted, but the document body and heuristics point to a link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://moscowshamrocks.com/uploads/1/3/0/6/130639329/xisuzuwofop.pdf
    • http://teaby.me/uploads/1/3/0/5/130540208/0adcdb94e.pdf
    • http://christinecarson.net/uploads/1/3/0/5/130589179/da28e.pdf
    • http://2018awpga-ns.com/uploads/1/3/0/5/130588407/033cd08255f.pdf
    • http://philipejike.com/uploads/1/3/0/3/130313368/5313086.pdf
    • http://christianmeditationrookies.com/uploads/1/3/0/5/130589108/19400c4.pdf
    • https://fomivipapatoba.weebly.com/uploads/1/3/0/2/130289693/c0adb91.pdf
    • http://mytexanlife.com/uploads/1/3/0/5/130550855/sejaj.pdf
    • http://walkaboutfarmfurniture.com/uploads/1/3/0/6/130621301/a1b3e4dc5f.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/7/130739853/130739853.html#uniden+bearcat+scanner+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001152.bin
32a30fd486c8874a14523323f3b05df1f34ec818c147f327fa971e23110fd1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152 8224 bytes

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