Malicious PDF — malware analysis report

Static analysis result for SHA-256 50335ec71c787db2…

MALICIOUS

PDF

14.9 KB Created: 2019-05-02 01:31:59 +01:00 Authoring application: mPDF 5.7
MD5: c417cc46b1c5034f86805e496014e746 SHA-1: 23674201c51510abc9084dca191a8fdf73019be4 SHA-256: 50335ec71c787db202ccb862a85e8a7602b8f75603d15ab335a31f025fae32e1
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm. The ML classifier also strongly indicated maliciousness. While the extracted URLs themselves are confirmed benign, the sheer volume and structure suggest an attempt to manipulate search engine results or distribute content through a link farm. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://loaminoo.linkpc.net/3092099091093098/Steampunk-Prime-A-Vintage-Steampunk-Reader-by-Mike-Ashley.pdf
    • http://loaminoo.linkpc.net/4091097090094095/Key-the-Steampunk-Vampire-Girl-and-the-Dungeon-of-Despair-Steampunk-Sorcery-1-by-Becket.pdf
    • http://loaminoo.linkpc.net/7095095091095096/Steampunk-Style-by-Steampunk-Oriental-Laboratory.pdf
    • http://loaminoo.linkpc.net/3092099090090095/The-Art-of-Steampunk-by-Art-Donovan.pdf
    • http://loaminoo.linkpc.net/7095095091092094/Steampunk-Tales-1-by-Jay-Lake.pdf
    • http://loaminoo.linkpc.net/3092099091095097/Steampunk-Tales-preview---1-by-G-D-Falksen.pdf
    • http://loaminoo.linkpc.net/4091098095093099/The-Best-of-Spanish-Steampunk-by-James-Womack.pdf
    • http://loaminoo.linkpc.net/7095094099099090/The-Steampunk-Detective-by-Darrell-Pitt.pdf
    • http://loaminoo.linkpc.net/2095096096098093/The-Steampunk-Bible-by-Jeff-VanderMeer.pdf
    • http://loaminoo.linkpc.net/3092099094096091/The-Steampunk-Gazette-by-Major-Tinker.pdf
    • http://loaminoo.linkpc.net/2097096096094093/The-Steampunk-Trilogy-by-Paul-Di-Filippo.pdf
    • http://loaminoo.linkpc.net/4091098093092097/Steampunk-Tales-Issue-12-by-G-D-Falksen.pdf
    • http://loaminoo.linkpc.net/1091094094099/Forged-by-Desire-London-Steampunk-4-by-Bec-McMaster.pdf
    • http://loaminoo.linkpc.net/4090093096093093/Of-Silk-and-Steam-London-Steampunk-5-by-Bec-McMaster.pdf
    • http://loaminoo.linkpc.net/1096092099095090/Kiss-of-Steel-London-Steampunk-1-by-Bec-McMaster.pdf
    • http://loaminoo.linkpc.net/7095095091090092/Legenderry-A-Steampunk-Adventure-by-Bill-Willingham.pdf
    • http://loaminoo.linkpc.net/7095095091090099/Ethereal-Devices-Steampunk-Scarlett-3-by-Kailin-Gow.pdf
    • http://loaminoo.linkpc.net/7095094099098097/Steampunk-Frankenstein-by-Mary-Wollstonecraft-Shelley.pdf
    • http://loaminoo.linkpc.net/6099094096095092/The-Sea-Is-Ours-Tales-from-Steampunk-Southeast-Asia-by-Jaymee-Goh.pdf
    • http://loaminoo.linkpc.net/3092099093091092/The-Mammoth-Book-of-Steampunk-by-Sean-Wallace.pdf
    • http://loaminoo.linkpc.net/3092099094096091/The-Steampunk-Gazette-by-

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