Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd3673e635bb350…

MALICIOUS

PDF

21.3 KB Created: 2019-05-02 17:15:00 +01:00 Authoring application: mPDF 5.7
MD5: ed871998df65cdceae066073d55fb81d SHA-1: 50176b1d2e82e5c5bdb85a88259f27d3674ebefe SHA-256: 5bd3673e635bb3502408550034bb09561d4c7f98f03851092c41a5e99db9a735
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, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the linked PDFs is unclear, the sheer volume and the nature of the heuristic suggest a malicious attempt to redirect users.

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://cmeinasaoo.duckdns.org/1b27b24b29b22b21/Zombies-Don-t-Read-5-FREE-YA-Stories-of-the-Living-Dead-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/1b27b24b28b21b27/Vampires-Drool-Zombies-Rule-A-FREE-YA-Paranormal-Novel-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/2b29b23b29b28b22/Married-with-Zombies-Living-with-the-Dead-1-by-Jesse-Petersen.pdf
    • http://cmeinasaoo.duckdns.org/1b27b26b24b20b21/Zombies-from-the-Pulps-Twenty-Classic-Stories-of-the-Walking-Dead-by-Jeffrey-Shanks.pdf
    • http://cmeinasaoo.duckdns.org/8b25b24b29b20b25/Ushers-Inc-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/2b24b25b29b23b28/Vamplayers-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/4b21b29b20b25b25/Zombie-Interrupted-Reanimated-Readz-1-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/2b28b26b27b28b23/Panty-Raid-Zombie-High-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/2b22b25b20b25b25/A-Town-Called-Snowflake-A-Holiday-Romance-by-Rusty-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/7b24b20b27b21b20/Good-Living-A-Free-Story-from-Selected-Shorts-New-American-Stories-by-Aleksandar-Hemon.pdf
    • http://cmeinasaoo.duckdns.org/4b21b25b21b21b29/Chicken-Soup-for-the-Kid-s-Soul-2-Read-Aloud-or-Read-Alone-Character-Building-Stories-for-Kids-Ages-6-10-by-Jack-Canfield.pdf
    • http://cmeinasaoo.duckdns.org/3b28b24b25b22b27/Joel-Kinder-Living-with-Zombies-by-Michael-Acciarino.pdf
    • http://cmeinasaoo.duckdns.org/1b20b27b23b28b29b29/The-Minimalist-Book-To-Organizing-Your-House-And-Downsizing-Your-Life-Simplify-Your-Lifestyle-Creating-Clutter-Free-Habits-And-A-Stress-Free-Enviroment-For-A-Simple-Living-To-Become-A-Happier-Person-by-Clarice-Rousseau.pdf
    • http://cmeinasaoo.duckdns.org/1b21b26b20b21b29b26/Zombies-Morgue-of-the-Dead-by-L-A-Taylor.pdf
    • http://cmeinasaoo.duckdns.org/2b26b28b25b27b25/The-Dead-Men-Grin-by-Bruno-Fischer.pdf
    • http://cmeinasaoo.duckdns.org/2b25b22b26b20b27/Marvel-Zombies-Dead-Days-by-Robert-Kirkman.pdf
    • http://cmeinasaoo.duckdns.org/3b26b20b21b27b23/Zombies-Encounters-with-the-Hungry-Dead-by-John-Skipp.pdf
    • http://cmeinasaoo.duckdns.org/1b21b21b24b20b26/The-Adventures-of-Rusty-Collected-Stories-by-Ruskin-Bond.pdf
    • http://cmeinasaoo.duckdns.org/2b21b24b21b23b25/Legend-of-Korra-How-to-Train-Your-Dragon-Plants-Vs-Zombies-Free-Comic-Book-Day-2016-by-Michael-Dante-DiMartino.pdf
    • http://cmeinasaoo.duckdns.org/3b21b22b27b29b23/Short-Stories-to-Learn-Reading-14-Quick-to-Read-Stories-with-Simple-Vocabulary-by-Betty-J-Byers.pdf