Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3a5b050e64fe56…

MALICIOUS

PDF

21.1 KB Created: 2019-04-30 03:46:29 +01:00 Authoring application: mPDF 5.7
MD5: adc8ccfe46110b67c97e244ebea2b731 SHA-1: 114236f9d77fa91e3e77676aae9f4e4212a74a26 SHA-256: 9d3a5b050e64fe5680a444f0294e6f83760a614cff1a3af6a4a2c0b753eed115
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. While many of these URLs are marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM suggest a malicious intent, likely for SEO poisoning or to distribute further malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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/3094094093094094/Darling-Monster-The-Letters-of-Lady-Diana-Cooper-to-her-Son-John-Julius-Norwich-1939-1952-by-Lady-Diana-Cooper.pdf
    • http://loaminoo.linkpc.net/4095094090095097/The-Cowboy-And-The-Lady-by-Diana-Palmer.pdf
    • http://loaminoo.linkpc.net/4092090094099/The-Mirage-of-Love-by-Lady-Diana.pdf
    • http://loaminoo.linkpc.net/1093098095092092/Byzantium-The-Decline-and-Fall-by-John-Julius-Norwich.pdf
    • http://loaminoo.linkpc.net/3091098095098094/The-Painted-Alphabet-by-Diana-Darling.pdf
    • http://loaminoo.linkpc.net/3091094094091090/The-Darling-Dahlias-and-the-Eleven-O-Clock-Lady-The-Darling-Dahlias-6-by-Susan-Wittig-Albert.pdf
    • http://loaminoo.linkpc.net/2090096093096090/Four-Princes-Henry-VIII-Francis-I-Charles-V-Suleiman-the-Magnificent-and-the-Obsessions-that-Forged-Modern-Europe-by-John-Julius-Norwich.pdf
    • http://loaminoo.linkpc.net/7099090096092/Four-Princes-Henry-VIII-Francis-I-Charles-V-Suleiman-the-Magnificent-and-the-Obsessions-that-Forged-Modern-Europe-by-John-Julius-Norwich.pdf
    • http://loaminoo.linkpc.net/2091091098091094/Secret-Intentions-Cooper-13-Cooper-Security-6-by-Paula-Graves.pdf
    • http://loaminoo.linkpc.net/1090094091091098/My-Darling-Clementine-The-Story-Of-Lady-Churchill-by-Jack-Fishman.pdf
    • http://loaminoo.linkpc.net/8092094093093/Diana-cu-Vanilie---The-Book-by-Diana-Sorescu.pdf
    • http://loaminoo.linkpc.net/4090093095097093/The-Normans-in-Sicily-The-Normans-in-the-South-1016-1130-and-the-Kingdom-in-the-Sun-1130-1194-by-John-Julius-Norwich.pdf
    • http://loaminoo.linkpc.net/3098091093099095/The-Bookshop-at-10-Curzon-Street-Letters-Between-Nancy-Mitford-and-Heywood-Hill-1952-73-by-John-Saumarez-Smith.pdf
    • http://loaminoo.linkpc.net/5091095092090097/The-Beginning-Of-The-Journey-The-Marriage-Of-Diana-And-Lionel-Trilling-by-Diana-Trilling.pdf
    • http://loaminoo.linkpc.net/1090098093093094097/A-Breath-of-Snow-and-Ashes-by-Diana-Gabaldon-Unabridged-MP3-CD-by-Diana-Gabaldon.pdf
    • http://loaminoo.linkpc.net/4095095093097097/Lady-Merry-s-Dashing-Champion-Lady-Trilogy-3-by-Jeane-Westin.pdf
    • http://loaminoo.linkpc.net/3092090095093097/Lady-Slings-the-Booze-Lady-Sally-s-2-Callahan-s-5-by-Spider-Robinson.pdf
    • http://loaminoo.linkpc.net/9099092098096092/Lady-of-Pattaya-Lady-Impenetrable-My-Mia-Farang-by-Michael-Schemmann.pdf
    • http://loaminoo.linkpc.net/1099098091097094/Lady-Be-Good-American-s-Lady-2-by-Susan-Elizabeth-Phillips.pdf
    • http://loaminoo.linkpc.net/3098095097091096/The-Cooper-Kids-The-Cooper-Kids-Adventures-1-4-by-Frank-E-Peretti.pdf
    • http://loaminoo.linkpc.net/3091094094091090/The-Darling-Dahlias-and-the-Eleven-O-Clo