Malicious PDF — malware analysis report

Static analysis result for SHA-256 2838d5d0d67731fa…

MALICIOUS

PDF

18.4 KB Created: 2019-05-01 18:14:48 +01:00 Authoring application: mPDF 5.7
MD5: 37d84a94ffa82d629df69f1b811c913a SHA-1: 84812d13175e15d4c01c5f4ecd471c5d6aab311f SHA-256: 2838d5d0d67731fabd38350a195a9ac4eada6e53435fe35e674f66f4744f294c
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier strongly indicates maliciousness, the specific intent beyond link distribution is unclear due to the lack of executable scripts or clear social engineering text in the document body. The primary attack pattern appears to be a link farm, potentially for SEO manipulation or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/9209204201209208/Cell-Behaviour-A-Tribute-to-Michael-Abercrombie-by-Ruth-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/2200208205206204/The-Best-of-John-Bellairs-The-House-with-a-Clock-in-Its-Walls-The-Figure-in-the-Shadows-The-Letter-the-Witch-and-the-Ring-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/2200207201208208/The-Collected-Joe-Abercrombie-The-Blade-Itself-Before-they-are-Hanged-Last-Argument-of-Kings-Best-Served-Cold-The-Heroes-Red-Country-by-Joe-Abercrombie.pdf
    • http://xiixmcuin.linkpc.net/3204205207201/The-Prisoner-of-Cell-25-Michael-Vey-1-by-Richard-Paul-Evans.pdf
    • http://xiixmcuin.linkpc.net/1201207200200203208/Discovering-Cell-Mechanisms-The-Creation-Of-Modern-Cell-Biology-by-William-Bechtel.pdf
    • http://xiixmcuin.linkpc.net/6201205201208206/The-Future-of-Evaluation-in-Society-A-Tribute-to-Michael-Scriven-by-Stewart-I-Donaldson.pdf
    • http://xiixmcuin.linkpc.net/1201208207203203205/The-Stem-Cell-Dilemma-The-Scientific-Breakthroughs-Ethical-Concerns-Political-Tensions-and-Hope-Surrounding-Stem-Cell-Research-by-Leo-Furcht.pdf
    • http://xiixmcuin.linkpc.net/2205204208209208/Bethlehem-Road-A-Guide-to-Ruth-by-Michael-Whitworth.pdf
    • http://xiixmcuin.linkpc.net/9209204201201202/The-Poems-of-Lascelles-Abercrombie-by-Lascelles-Abercrombie.pdf
    • http://xiixmcuin.linkpc.net/6208208209204200/Before-Herring-Cove-Road-Ruth-Goldman-and-the-Nincompoop-by-Michael-Kroft.pdf
    • http://xiixmcuin.linkpc.net/3204209204202201/The-Ghost-in-the-Mirror-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/3201202201200207/The-Face-in-the-Frost-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/4206209200202208/Chessmen-of-Doom-The-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/2204204203207204/The-Figure-in-the-Shadows-Lewis-Barnavelt-2-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/1204200206204/The-Mummy-the-Will-and-the-Crypt-Johnny-Dixon-2-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/1200205208205200/The-House-with-a-Clock-in-Its-Walls-Lewis-Barnavelt-1-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/4205201201206204/The-House-with-a-Clock-in-Its-Walls-Lewis-Barnavelt-1-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/4206208202200208/The-Curse-of-the-Blue-Figurine-Johnny-Dixon-1-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/1208204204202203/The-Curse-of-the-Blue-Figurine-Johnny-Dixon-1-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/4206209200201202/The-Spell-of-the-Sorcerer-s-Skull-Johnny-Dixon-3-by-John-Bellairs.pdf
    • http://xiixmcuin.linkpc.net/1201208207203203205/The-Stem-Cell-Dilemma-The-Scientific-Breakthroughs-Ethical-Con

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