Malicious PDF — malware analysis report

Static analysis result for SHA-256 736ba5dd7e0087ec…

MALICIOUS

PDF

17.8 KB Created: 2019-05-07 04:25:40 +01:00 Authoring application: mPDF 5.7
MD5: cfae278e2a13c81f3c397eefbc148551 SHA-1: ad1d609ce8dc63d7693401d6c8781f75195bf2d3 SHA-256: 736ba5dd7e0087ec4447a0f406fdc1e451e72a5ba0e3f50400fe2085044f1792
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on a dynamic DNS domain, indicating a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the PDF structure and the ML classifier's high confidence suggest malicious intent, likely to drive traffic or potentially host malicious content indirectly. The primary attack pattern observed is the mass distribution of links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/3093091094096095/Good-Thing-Bad-Thing-50-Reasons-3-by-Nick-Alexander.pdf
    • http://loaminoo.linkpc.net/1096098093098094/There-s-No-Such-Thing-as-Free-Speech-And-It-s-a-Good-Thing-Too-by-Stanley-Fish.pdf
    • http://loaminoo.linkpc.net/3093091090097097/Better-Than-Easy-50-Reasons-4-by-Nick-Alexander.pdf
    • http://loaminoo.linkpc.net/3095099099098092/A-Very-Good-Thing-Dead-End-3-by-P-S-Power.pdf
    • http://loaminoo.linkpc.net/3094090098093094/A-Good-Thing-2-If-I-Be-Lifted-Up-by-She-Nell.pdf
    • http://loaminoo.linkpc.net/2093095095092096/Every-Good-Thing-by-M-Jules-Aedin.pdf
    • http://loaminoo.linkpc.net/3098092094095095/One-Good-Thing-about-America-by-Ruth-Freeman.pdf
    • http://loaminoo.linkpc.net/3096099092095093/English-Lit-Relit-A-Short-History-of-English-Literature-from-the-Precursors-Before-Swearing-to-the-Pre-Raphaelites-and-a-Little-After-Intended-to-Help-Students-See-the-Thing-Through-or-See-Through-the-Thing-and-Omitting-Nothing-Unimportant-by-Richard-Armour.pdf
    • http://loaminoo.linkpc.net/2093096096/Too-Much-of-a-Good-Thing-How-Four-Key-Survival-Traits-Are-Now-Killing-Us-by-Lee-Goldman.pdf
    • http://loaminoo.linkpc.net/3097094091099099/Mr-Strong-Good-Thing-I-Came-Along-by-Michael-Daedalus-Kenny.pdf
    • http://loaminoo.linkpc.net/3092094098098090/No-Such-Thing-as-a-Lost-Cause-A-Brandy-Alexander-Mystery-5-by-Shelly-Fredman.pdf
    • http://loaminoo.linkpc.net/3092094098097095/No-Such-Thing-As-A-Secret-A-Brandy-Alexander-Mystery-1-by-Shelly-Fredman.pdf
    • http://loaminoo.linkpc.net/2091092095093099/The-Great-Good-Thing-The-Sylvie-Cycle-1-by-Roderick-Townley.pdf
    • http://loaminoo.linkpc.net/3090092093099/Cancer---It-s-a-Good-Thing-I-Got-It-The-Life-Story-of-a-Very-Lucky-Man-by-David-A-Koop.pdf
    • http://loaminoo.linkpc.net/1099095093092091/A-Wicked-Thing-A-Wicked-Thing-1-by-Rhiannon-Thomas.pdf
    • http://loaminoo.linkpc.net/4097090093099098/Sweet-Little-Thing-Sweet-Thing-1-5-by-Renee-Carlino.pdf
    • http://loaminoo.linkpc.net/5094095092091/Sweet-Little-Thing-Sweet-Thing-1-5-by-Renee-Carlino.pdf
    • http://loaminoo.linkpc.net/1092090093098094/Wild-Thing-Wild-Thing-1-by-Robin-Kaye.pdf
    • http://loaminoo.linkpc.net/1090099093097093/That-Thing-by-L-S-Siel.pdf
    • http://loaminoo.linkpc.net/2091099095094097/A-Very-Very-Bad-Thing-by-Jeffery-Self.pdf

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