Malicious PDF — malware analysis report

Static analysis result for SHA-256 745efdc878d27919…

MALICIOUS

PDF

14.8 KB Created: 2019-04-30 01:55:36 +01:00 Authoring application: mPDF 5.7
MD5: f72c75b0b8f19f1343b6f64e47bf286b SHA-1: 9f56269d28994cb281ec44634b0a25a0aa847d86 SHA-256: 745efdc878d279195103dfde4281babb7d458e5fb4147fbb7ef60761b3cedcc8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files hosted on a dynamic DNS domain. This behavior is indicative of a link farm or a method to distribute further content, potentially malicious. While the ML classifier flagged it as malicious, the specific intent beyond link distribution is unclear due to the lack of executable scripts or readable document body content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/3090091091096096/Discovering-Ren-Discovering-Ren-1-by-Jennifer-Eifrig.pdf
    • http://loaminoo.linkpc.net/2091091096097090/Discovering-April-Discovering-Trilogy-1-by-Sheena-Hutchinson.pdf
    • http://loaminoo.linkpc.net/6095099091096092/Discovering-QLO-by-Gina-Ardente.pdf
    • http://loaminoo.linkpc.net/4090093095098091/Discovering-Aberration-by-S-C-Barrus.pdf
    • http://loaminoo.linkpc.net/4093090097096099/Discovering-Arugula-by-Elizabeth-Allen.pdf
    • http://loaminoo.linkpc.net/4095090099096098/Discovering-the-Character-of-God-by-George-MacDonald.pdf
    • http://loaminoo.linkpc.net/9099098091098/Supersoul-13-Discovering-the-Soul-of-God-by-Buddha-Z-.pdf
    • http://loaminoo.linkpc.net/4098096092094099/Everything-as-it-should-be---discovering-Switzerland-by-Susan-Meredith.pdf
    • http://loaminoo.linkpc.net/2095096093098092/Unearthing-Cole-Discovering-Me-1-by-A-M-Arthur.pdf
    • http://loaminoo.linkpc.net/1090099092093091099/Discovering-the-Expanding-Universe-by-Harry-Nussbaumer.pdf
    • http://loaminoo.linkpc.net/2096092099097099/Joy-on-Demand-The-Art-of-Discovering-the-Happiness-Within-by-Chade-Meng-Tan.pdf
    • http://loaminoo.linkpc.net/2093092096094095/Discovering-Africa-s-Past-by-Basil-Davidson.pdf
    • http://loaminoo.linkpc.net/2093095091096092/Discovering-God-s-Will-for-Your-Life-Your-Journey-with-God-by-Mike-Lutz.pdf
    • http://loaminoo.linkpc.net/1091090094096090090/Journeying-to-the-One-Discovering-the-Beautiful-Names-of-God-by-Ali-Mermer.pdf
    • http://loaminoo.linkpc.net/9090095093090095/Discovering-The-Book-Of-Common-Prayer-by-Sue-Careless.pdf
    • http://loaminoo.linkpc.net/2099096096091090/Discovering-Your-Amazing-Marriage-by-Jason-Coleman.pdf
    • http://loaminoo.linkpc.net/4095097099091090/Discovering-Mythology---Gods-and-Goddesses-by-Wendy-Mass.pdf
    • http://loaminoo.linkpc.net/5098094092096098/The-Artist-s-Way-A-Course-in-Discovering-and-Recovering-Your-Creative-Self-by-Julia-Cameron.pdf
    • http://loaminoo.linkpc.net/1091092092093096/A-Gap-in-Nature-Discovering-the-World-s-Extinct-Animals-by-Tim-Flannery.pdf
    • http://loaminoo.linkpc.net/7097092097094091/Discovering-Pure-Classical-Pilates-by-Peter-Fiasca.pdf