Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1c28fd790a1b46…

MALICIOUS

PDF

19.2 KB Created: 2020-01-02 06:04:28 +00:00 Authoring application: mPDF 5.7
MD5: e1a53bd4a2d68041e82c5ccc34d8f370 SHA-1: 266082f63bf3e4345b6e0b3f3b9612d711334999 SHA-256: fe1c28fd790a1b461167828a4e64f60834e2e4dec53a27f25b1cbd4f975fb6eb
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many with numeric slugs, designed to lure users into downloading other PDFs. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a common tactic for SEO poisoning to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, but the link farm is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/2738737738739737/Wireless-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/2735737735739732/Wireless-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/6735737735734736/Hacking-Exposed-Wireless-Wireless-Security-Secrets-amp-Solutions-by-Johnny-Cache.pdf
    • http://cefasfese.4pu.com/8738732731737735/Academic-Press-Library-in-Biomedical-Applications-of-Mobile-and-Wireless-Communications-Co-Operative-and-Energy-Efficient-Body-Area-and-Wireless-Sensor-Networks-for-Healthcare-Applications-by-Akram-Alomainy.pdf
    • http://cefasfese.4pu.com/8735739739732732/Mobile-Wireless-Communications-by-Mischa-Schwartz.pdf
    • http://cefasfese.4pu.com/1730730737738730737/Mobile-and-Wireless-Network-Security-and-Privacy-by-Peter-Reiher.pdf
    • http://cefasfese.4pu.com/6735734739733738/Building-PDA-Databases-for-Wireless-and-Mobile-Development-by-Robert-Laberge.pdf
    • http://cefasfese.4pu.com/1731733735731739732/Wireless-LANs-802-11-WLAN-Technologie-und-praktische-Umsetzung-im-Detail-by-J-rg-Rech.pdf
    • http://cefasfese.4pu.com/1739739733732736/It-Was-Always-You-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/2737737739730736/For-The-Living-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/1736730736734734/With-The-Band-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/6733733730730/Static-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/7735739736739732/For-The-Living-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/6737738736732731/Mobile-And-Wireless-Networks-Security-Proceedings-Of-The-Mwns-2008-Workshop-Singapore-9-April-2008-by-Maryline-Laurent-maknavicius.pdf
    • http://cefasfese.4pu.com/1731732736738730737/Wireless-Algorithms-Systems-and-Applications-12th-International-Conference-Wasa-2017-Guilin-China-June-19-21-2017-Proceedings-by-Liran-Ma.pdf
    • http://cefasfese.4pu.com/4735733733738732/Hostile-Ground-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/4737736730736737/Hostile-Ground-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/2732736733733736/The-Given-amp-The-Taken-Tooth-amp-Claw-1-by-L-A-Witt.pdf
    • http://cefasfese.4pu.com/1739735731739737/The-Watch-Red-1-by-Amanda-Witt.pdf
    • http://cefasfese.4pu.com/1736735735735734/If-The-Seas-Catch-Fire-by-L-A-Witt.pdf

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