Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c76893f65f9cec…

MALICIOUS

PDF

33.8 KB Authoring application: pstoedit
MD5: 427461a2915aaa7f7ff19d4ebe012bb3 SHA-1: 4b68948d242aa641b2f58e3b3095c92dcbd77133 SHA-256: 03c76893f65f9cecd4420ca36f37e018a3f15ba1991b482c803f96d3af9d345c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically identifying it as a phishing-related threat. The document body itself is heavily corrupted and unreadable, but the presence of numerous external links is the primary indicator of malicious intent.

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://tuffnlitehockey.com/uploads/1/3/0/8/130873801/bexuponinep-rudodovabak.pdf
    • http://clearecommerce.com/uploads/1/3/0/5/130550874/fokunijexix-wumubiwu-nagepinaroj.pdf
    • http://ninjatechnologies.com/uploads/1/3/0/2/130272928/50d4a46.pdf
    • http://shuttlemonkeyrides.com/uploads/1/3/0/4/130435729/wafokizazimuk.pdf
    • http://htrionline.net/uploads/1/3/0/4/130489039/cdd9c22f75cde5.pdf
    • http://insuranceexecutive.net/uploads/1/3/0/8/130814411/5efc0.pdf
    • http://popmetals.com/uploads/1/3/0/3/130323581/6002937.pdf
    • http://uniquecareservices.net/uploads/1/3/0/7/130775743/5543927.pdf
    • http://www.mexkiwiwedding.com/uploads/1/3/0/6/130621162/187d462.pdf
    • http://ttmr8.org/uploads/1/3/0/2/130291702/foweporovunofetemo.pdf
    • http://skybeveragesco.com/uploads/1/3/0/6/130603710/gimamapozes-ruwudebibu.pdf
    • http://pleasurehouseva.gammaxiques.org/uploads/1/3/0/4/130483265/130483265.html#ielts+speaking+topic+favourite+musical+instrument

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fab.bin
a0877d3a609bba565557f755c4536491fc103b67339e31e859bac33968da099a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 6880 bytes

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