Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafecdde820deb94…

MALICIOUS

PDF

23.7 KB Created: 2019-05-02 17:45:07 +01:00 Authoring application: mPDF 5.7
MD5: 157621e7435c4b8f75a69e64d005814d SHA-1: f4d8c09927157c0a12b7c1e7877e2e9741644238 SHA-256: cafecdde820deb94af8961c6b79313a1a0eccab475644a64beb2c7ba785e3836
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF was flagged by a critical heuristic for containing a mass external link farm, with 28 links pointing to various book titles. The ML classifier also strongly indicated maliciousness. The document body is heavily corrupted, but the embedded links are the primary attack vector. The intent appears to be to drive traffic to a large collection of PDFs, likely for SEO manipulation or to host malicious content disguised as legitimate files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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/6097095097093092/Shadows-of-the-Dark-Crystal-Jim-Henson-s-The-Dark-Crystal-1-by-J-M-Lee.pdf
    • http://loaminoo.linkpc.net/3093094095092094/The-World-of-The-Dark-Crystal-by-Brian-Froud.pdf
    • http://loaminoo.linkpc.net/1097091095095094/Fragile-Crystal-Rubies-and-Rivalries-The-Crystal-Fragments-Trilogy-2-by-M-J-Lawless.pdf
    • http://loaminoo.linkpc.net/2095092097096096/Refracted-Crystal-Diamonds-and-Desire-The-Crystal-Fragments-Trilogy-3-by-M-J-Lawless.pdf
    • http://loaminoo.linkpc.net/9095091094097/Crystal-Promise-The-Shattered-Crystal-1-by-James-Funfer.pdf
    • http://loaminoo.linkpc.net/1095099096095090/Crystal-Line-Crystal-Singer-3-by-Anne-McCaffrey.pdf
    • http://loaminoo.linkpc.net/5095099095091097/Zelda-and-the-Crystal-Comb-The-Crystal-Adventures-3-by-R-W-Mitchell.pdf
    • http://loaminoo.linkpc.net/2090093098097090/Zelda-and-the-Crystal-Slippers-The-Crystal-Adventures-1-by-R-W-Mitchell.pdf
    • http://loaminoo.linkpc.net/4093093098094093/Crystal-Traveler-Crystal-Message-Chronicles-1-by-R-B-Breighton.pdf
    • http://loaminoo.linkpc.net/1096092098099090/Western-genre-Novels-including-The-Dark-Tower-Ii-The-Drawing-Of-The-Three-The-Dark-Tower-The-Gunslinger-The-Dark-Tower-Iv-Wizard-And-Glass-The-Dark-Tower-Iii-The-Waste-Lands-The-Dark-Tower-V-Wolves-Of-The-Calla-The-Wind-Through-The-Keyhole-by-Hephaestus-Books.pdf
    • http://loaminoo.linkpc.net/5099096092099/The-Immortals-After-Dark-Collection-Dreams-Of-A-Dark-Warrior-Demon-From-The-Dark-A-Hunger-Like-No-Other-Immortals-After-Dark-2-10-11-by-Kresley-Cole.pdf
    • http://loaminoo.linkpc.net/3092092093090096/Secret-of-the-Crystal-Secret-of-the-Crystal-1-by-Brian-K-Larson.pdf
    • http://loaminoo.linkpc.net/3098092097099097/Caress-of-Pleasure-A-Dark-Pleasures-Novella-Dark-Pleasures-3-5-1001-Dark-Nights-17-by-Julie-Kenner.pdf
    • http://loaminoo.linkpc.net/2099094092092091/Bad-Boys-After-Dark-Brett-Bad-Boys-After-Dark-4-Billionaires-After-Dark-8-Love-in-Bloom-50-by-Melissa-Foster.pdf
    • http://loaminoo.linkpc.net/2090092090095096/Bad-Boys-After-Dark-Dylan-Bad-Boys-After-Dark-2-Billionaires-After-Dark-6-Love-in-Bloom-48-by-Melissa-Foster.pdf
    • http://loaminoo.linkpc.net/2090092090099097/Bad-Boys-After-Dark-Carson-Bad-Boys-After-Dark-3-Billionaires-After-Dark-7-Love-in-Bloom-49-by-Melissa-Foster.pdf
    • http://loaminoo.linkpc.net/9094092092092/Acheron-Dark-Hunter-8-Entire-Dark-Hunterverse-15-Dark-Hunterverse-23-by-Sherrilyn-Kenyon.pdf
    • http://loaminoo.linkpc.net/4093099098095093/Princess-The-Dark-Shadows-1-by-Ariel-Marie.pdf
    • http://loaminoo.linkpc.net/2091098097096092/Dark-City-The-Order-of-Shadows-1-by-Kit-Hallows.pdf
    • http://loaminoo.linkpc.net/3095097098095097/A-Light-Amongst-Shadows-Dark-is-the-Night-1-by-Kelley-York.pdf