Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd1cf190dd569c8…

MALICIOUS

PDF

26.8 KB Created: 2019-04-30 03:59:56 +01:00 Authoring application: mPDF 5.7
MD5: 3ff46e69e42460121d7a84a3ba3999b9 SHA-1: bc993a1eca0149e60ac4a2970366e1792c33a712 SHA-256: 5bd1cf190dd569c8c8dbe5ef8c5f17ed381f997fe567fc48565a2cd0065aae0f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to external PDF files. This behavior is indicative of a link farm or a method to distribute further malicious content. The ML classifier also flagged this PDF as malicious, increasing the confidence in its suspicious nature. No scripts were extracted, but the sheer volume of external links suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/3205202207202202/The-Penguin-Book-of-Caribbean-Short-Stories-by-E-A-Markham.pdf
    • http://xiixmcuin.linkpc.net/3202205203207207/The-New-Penguin-Book-of-Scottish-Short-Stories-by-Ian-Murray.pdf
    • http://xiixmcuin.linkpc.net/3202207206207209/The-Second-Penguin-Book-of-English-Short-Stories-by-Christopher-Dolley.pdf
    • http://xiixmcuin.linkpc.net/4202208206201204/A-Second-Dawn-Lesbian-Erotica-The-best-of-Leasbian-Erotica-Short-Stories-15-Minutes-short-read-Lesbian-Short-Stories-Book-2-by-J-D-Killi.pdf
    • http://xiixmcuin.linkpc.net/2201208209204205/The-Penguin-Book-of-Vampire-Stories-by-Alan-Ryan.pdf
    • http://xiixmcuin.linkpc.net/3201203202209201/Short-Stories-For-Early-Reading-Includes-16-Original-Stories-with-Covers-Elementary-Kids-Stories-Childrens-Book-Bundle-Animals-Character-Building-Lessons-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/4208201208206205/P-I-Penguin-and-the-Case-of-the-Christmas-Lights-P-I-Penguin-Specials-Book-1-by-Bec-J-Smith.pdf
    • http://xiixmcuin.linkpc.net/7205205203208201/JAMES-LEE-BURKE-BOOKS-AND-ALL-SHORT-STORIES-CHECKLIST-AND-SUMMARIES---INCLUDES-LATEST-DAVE-ROBICHEAUX---JAMES-LEE-BURKE-SHORT-STORIES-AND-STANDALONE-NOVELS-AND-CHECKLIST-BEST-READING-ORDER-Book-56-by-Avid-Reader.pdf
    • http://xiixmcuin.linkpc.net/8202205206207209/The-Boy-Who-Forgot-A-Delacourt-Short-Story-The-Delacourt-Short-Stories-Book-2-by-S-A-Tedman.pdf
    • http://xiixmcuin.linkpc.net/3201203200201202/Short-Stories-for-Adventurous-Kids-Giant-Bundle-of-Short-Stories-that-Kids-Love-13-Stories-Included-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/3201203206204200/Short-Elementary-Level-Stories-Bundle-2-3-Short-Stories-in-1-Ebook-Books-about-Santa-mystery-space-animals-planets-family-Perfect-for-kids-under-10-learning-to-read-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/3201203202208202/Short-Elementary-Level-Stories-Bundle-5-3-Short-Stories-in-1-Ebook-Books-about-love-signing-baby-animals-school-planets-family-Perfect-for-kids-under-10-learning-to-read-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/3200203201206206/The-Mammoth-Book-of-Lesbian-Short-Stories-by-Emma-Donoghue.pdf
    • http://xiixmcuin.linkpc.net/3203201204209206/The-Oxford-Book-of-Irish-Short-Stories-by-William-Trevor.pdf
    • http://xiixmcuin.linkpc.net/1209206209209/Casualty-of-War-The-Arcadia-Book-of-Gay-Short-Stories-by-Neil-Bartlett.pdf
    • http://xiixmcuin.linkpc.net/3202207207200203/The-Oxford-Book-of-Japanese-Short-Stories-by-Theodore-W-Goossen.pdf
    • http://xiixmcuin.linkpc.net/3201203207201205/Short-Stories-for-Early-Readers-17-Stories-in-1-Fairy-Tales-Kids-Story-Bundle-Childrens-ebooks-Short-Story-Series-Diaries-of-Simple-Reading-by-Betty-J-Byers.pdf
    • http://xiixmcuin.linkpc.net/3208208204202201/The-Iridescent-Butterfly-A-Book-of-Twenty-Short-Stories-by-Hilary-West.pdf
    • http://xiixmcuin.linkpc.net/3208208205201205/The-Pocket-Book-of-Modern-American-Short-Stories-by-Philip-Van-Doren-Stern.pdf
    • http://xiixmcuin.linkpc.net/6201205209209207/Mexican-Short-Stories-Cuentos-mexicanos-A-Dual-Language-Book-by-Stanley-Appelbaum.pdf

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