Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e3f9ffd8985fca…

MALICIOUS

PDF

40.4 KB Authoring application: PDF Studio
MD5: d23a65328ae30f562e5cd644f2aa0b04 SHA-1: 4de23b738f6c15322f69345e1cc60a346f92b71a SHA-256: d2e3f9ffd8985fcaa693dec207d6d6f96dbb490bd033f852f5a26177630a327c
150 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating a link farm. The document body, though partially corrupted, contains text related to 'typhoid treatment' and embeds numerous URLs, suggesting a phishing or SEO manipulation tactic. The primary function appears to be directing users to external, potentially malicious, content.

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://dream-job.site/uploads/1/3/0/6/130604466/kegufilevusunal.pdf
    • http://localchelmsfordbuilders.com/uploads/1/3/0/6/130604538/90343.pdf
    • http://ardsleylatin.org/uploads/1/3/0/2/130270979/logig.pdf
    • http://mivux.ch/uploads/1/3/0/3/130312986/mawuwusuzusaxegukabu.pdf
    • http://simplygreenhomeservices.com/uploads/1/3/0/4/130488885/2406557.pdf
    • http://tastinggame.eu/uploads/1/3/0/6/130604424/cf0948924d9.pdf
    • http://btaccountingandtax.com/uploads/1/3/0/4/130483820/2926642.pdf
    • http://nuobeijinghotel-chinese.devsite-1.com/uploads/1/3/0/2/130289019/130289019.html#typhoid+treatment+wikipedia

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001100.bin
0e381b65965de74fbce506bd490ec065355ce9de9a77001a0c97d0ec2095b5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100 7860 bytes

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