Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb6481d07893921…

MALICIOUS

PDF

19.6 KB Created: 2019-05-02 05:51:46 +01:00 Authoring application: mPDF 5.7
MD5: e23acb3fa08fa0bafb86cc847b733c5c SHA-1: 039d2b052d52a02e60d19bcedf630720bbb3b87a SHA-256: cfb6481d0789392189e7e093b6a8a1c0d67100f1eb6b3a2ee8cc0b9e32c70c3f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM indicates that these links are likely intended to direct users to external content, potentially malicious. While the specific content of the linked PDFs is benign according to reputation labels, the sheer volume and structure suggest a malicious intent to distribute or redirect. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/3208201207207/Scary-Stories-to-Tell-in-the-Dark-Scary-Stories-1-by-Alvin-Schwartz.pdf
    • http://xiixmcuin.linkpc.net/2204204201209204/Night-Noises-And-Other-Mole-And-Troll-Stories-Mole-and-Troll-3-by-Tony-Johnston.pdf
    • http://xiixmcuin.linkpc.net/3208201200202205/The-Cowboy-and-the-Blackeyed-Pea-by-Tony-Johnston.pdf
    • http://xiixmcuin.linkpc.net/1203204206202203/A-Small-Thing-but-Big-by-Tony-Johnston.pdf
    • http://xiixmcuin.linkpc.net/1201208201202202207/Alien-And-Possum-Friends-No-Matter-What-by-Tony-Johnston.pdf
    • http://xiixmcuin.linkpc.net/1201203206209201207/No-Way-Out-And-Other-Scary-Short-Stories-by-M-J-Ware.pdf
    • http://xiixmcuin.linkpc.net/3207208203200/Horrors-365-Scary-Stories-by-Stefan-R-Dziemianowicz.pdf
    • http://xiixmcuin.linkpc.net/3201201207202200/One-Spooky-Night-amp-Other-Scary-Stories-by-Mauri-Kunnas.pdf
    • http://xiixmcuin.linkpc.net/1200205208206209201/6-Scary-Halloween-Stories-for-Teens-2-Urban-Legends-by-PW-Pretorius.pdf
    • http://xiixmcuin.linkpc.net/7200201204200206/Ask-the-Bones-Scary-Stories-from-Around-the-World-by-Arielle-North-Olson.pdf
    • http://xiixmcuin.linkpc.net/4203207202205208/Unpacked-Travel-Disaster-Stories-by-Tony-Wheeler-and-Other-Lonely-Planet-Authors-by-Tony-Wheeler.pdf
    • http://xiixmcuin.linkpc.net/3208201209201207/Can-You-See-What-I-See-On-A-Scary-Scary-Night-by-Walter-Wick.pdf
    • http://xiixmcuin.linkpc.net/2203206202203200/Kowabana-True-Japanese-scary-stories-from-around-the-internet-Volume-One-by-Tara-A-Devlin.pdf
    • http://xiixmcuin.linkpc.net/3201203207202200/Scary-Scary-Halloween-by-Eve-Bunting.pdf
    • http://xiixmcuin.linkpc.net/3201203203207202/Halloween-Stories-for-Kids-amp-More-17-Assorted-Stories-to-Read-with-Kids-at-Halloween-Bonus-Halloween-Party-Story-Kids-Story-Bundle-Children-s-Series-Spooky-Scary-Funny-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/4208202207209204/A-Newbery-Halloween-A-Dozen-Scary-Stories-by-Newbery-Award-Winning-Authors-by-Martin-H-Greenberg.pdf
    • http://xiixmcuin.linkpc.net/1203202203201209/Faith-Beyond-Belief-Stories-of-Good-People-Who-Left-Their-Church-Behind-by-Margaret-Placentra-Johnston.pdf
    • http://xiixmcuin.linkpc.net/2201204203200208/Stories-We-Could-Tell-by-Tony-Parsons.pdf
    • http://xiixmcuin.linkpc.net/4204204200207203/Give-Me-Shelter-Stories-About-Children-Who-Seek-Asylum-by-Tony-Bradman.pdf
    • http://xiixmcuin.linkpc.net/6205201204205/Bedbug-s-Writing-A-Collection-of-Short-Stories-Poetry-Volume-One-by-Tony-Lovell.pdf
    • http://xiixmcuin.linkpc.net/7200201204200206/Ask-the-Bones-Scary-Stories-from-Around-the-World