Malicious PDF — malware analysis report

Static analysis result for SHA-256 625d65ea3e0055af…

MALICIOUS

PDF

14.2 KB Created: 2019-04-30 09:27:30 +01:00 Authoring application: mPDF 5.7
MD5: 054cc25e1d32b5abbe91d40d3af0fde6 SHA-1: 5ec972473ba92046f8bb3a9e89806bfc558a4517 SHA-256: 625d65ea3e0055af00adbf5498dbc9b9311527e14ef2486c1f2719556459db8a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to a domain that appears to be hosting a link farm. This is strongly indicative of SEO poisoning or a similar scheme to drive traffic to potentially malicious content. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://xiixmcuin.linkpc.net/7208201203207202/The-Last-Boy-by-Robert-H-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/1201202209209203202/Advanced-Environmental-Chemical-And-Biological-Sensing-Technologies-V-10-11-September-2007-Boston-Massachusetts-Usa-by-Robert-A-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201203209201/Nightbloom-by-Herbert-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/4202204206204204/Admissions-by-Nancy-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/4207204201203203/Coming-of-Age-by-Luke-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201202205202/The-Carnage-Account-by-Ben-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/2205209200207200/The-Treasure-of-Ravenwood-by-Barbara-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/2202206202209209/Litigious-Society-by-Jethro-K-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201202208204/Shadow-Dancers-by-Herbert-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201202204209/All-the-Wrong-Places-by-Lisa-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201202205205/The-Lobsterman-s-Daughter-by-Michael-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201204206203/Real-Power-by-Dovid-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201204206204/Red-Sonja-Revenge-of-the-Gods-by-Luke-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/5200209208209200/A-History-of-the-Sweetness-of-the-World-by-Michael-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201203208200/Saul-Lieberman-The-Man-and-His-Work-by-Elijah-J-Schochet.pdf
    • http://xiixmcuin.linkpc.net/7208201203208209/Human-Learning-and-Memory-by-David-A-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/8201209206208206/Archibald-s-Swiss-Cheese-Mountain-by-Sylvia-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201203208203/Lippincott-s-Illustrated-Q-Review-of-Biochemistry-by-Michael-A-Lieberman.pdf
    • http://xiixmcuin.linkpc.net/7208201202208207/The-Lieberman-Open-Orthodox-Haggadah-by-Shmuel-Herzfeld.pdf
    • http://xiixmcuin.linkpc.net/6200204202201203/Trois-Heures-Du-Matin-New-York-by-Herbert-Lieberman.pdf

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