Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bd83a2eacdaa41…

MALICIOUS

PDF

32.0 KB Authoring application: Adobe PDF Library 9.0
MD5: f4f67e84c782dc4db24cad13b846e192 SHA-1: 30eb3a851fd1d52128a05c5f34cd02150fc2f1ef SHA-256: d2bd83a2eacdaa4119be6aaab8b432768baab63d9d0b37082671ed4e5ea74b1a
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, all pointing to other PDF files. The document body, though partially corrupted, suggests a lure related to a 'Fatima fertilizer annual report 2018'. This indicates a phishing or social engineering attack aiming to redirect users to malicious content hosted on various domains. The ClamAV detection and ML classifier further support its malicious nature.

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://artisanstory.com.au/uploads/1/3/0/4/130476574/5868950.pdf
    • http://dugenanizu.ring-lamp.ru/uploads/2020/01/28/nefiwotepavel.pdf
    • http://opusjobs.net/uploads/1/3/0/2/130272360/919346.pdf
    • http://7th-hitchin.org.uk/uploads/1/3/0/5/130541004/xinasorediwawusazaf.pdf
    • http://ericamcquiddypsyd.com/uploads/1/3/0/6/130604551/ravomuvorimi.pdf
    • http://officeprocleaningllc.info/uploads/1/3/0/5/130543198/pogixatunasezonab.pdf
    • http://mikeintucson.com/uploads/1/3/0/6/130621557/130621557.html#fatima+fertilizer+annual+report+2018

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001101.bin
bcc83a9ca16f1a2afcf12f74b7c2cb124c9215704fd04177fd3d70212a7b59a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101 8040 bytes

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