Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ae67e80fed75ae…

MALICIOUS

PDF

39.3 KB Authoring application: Karbon
MD5: 8185c1db519fa04dfa3524e21d8dcbc3 SHA-1: a420203bffe1764a259cc9255af9ff6713e770b7 SHA-256: 71ae67e80fed75ae484481d403b6671a032b1ac864dffd11ec5fdb9e70501b58
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to other PDF files hosted on various domains, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate a malicious phishing or spamming campaign. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings suggest an attempt to drive traffic to malicious or deceptive content, likely involving JavaScript execution within the PDF viewer.

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://amandawoodshall.com/uploads/1/3/0/4/130488569/diligozoze.pdf
    • http://rexinkscreenprinting.com/uploads/1/3/0/3/130313673/1987068.pdf
    • http://jare.eovma.fun/uploads/2020/01/28/bawuwap.pdf
    • https://gakizapoxuzud.weebly.com/uploads/1/3/0/2/130272591/0d76ceba.pdf
    • http://educationalroboticsreview.com/uploads/1/3/0/2/130291874/wixoloratodudek.pdf
    • http://mygvhs.com/uploads/1/3/0/2/130270855/fugewasukokem.pdf
    • http://championtrikes.net/uploads/1/3/0/4/130476483/175a05c.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/5/130590661/130590661.html#tracing+cat+meme+template
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001176.bin
a91d19158a8aec4da448b882625d39add84bee142eac1135ebc0bf9ce1de93ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1176 9492 bytes
font_01_sfnt_off0000513d.bin
d6a0db68f101ac0daa7442a8b1a91b46d47467bc209d48c09e2477bcdd681aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x513D 16636 bytes

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