Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f057a9ccc6c0c5…

MALICIOUS

PDF

23.6 KB Created: 2020-01-04 08:58:14 +00:00 Authoring application: mPDF 5.7
MD5: c2bbdc5c53e034f98179b6b196375063 SHA-1: 5a394c95d807ffc6b616c0855b8672e48949fec6 SHA-256: 19f057a9ccc6c0c5e37cef67de5112509072dc5ec77b84632c9dd1f301ffa85f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents hosted on the domain 'cefasfese.4pu.com'. This is indicative of a link farm or SEO manipulation tactic, which can be used to distribute malicious content or improve the ranking of malicious sites. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://cefasfese.4pu.com/2731734739731736/Simple-Courage-A-True-Story-of-Peril-on-the-Sea-by-Frank-Delaney.pdf
    • http://cefasfese.4pu.com/1731734734731739730/Wild-amp-Wacky-Totally-True-Bible-Stories---All-about-Courage-by-Frank-E-Peretti.pdf
    • http://cefasfese.4pu.com/7735732731738735/The-True-Story-of-Riad-Khashoggi---Rebel-Sheikh-by-Alan-Delaney.pdf
    • http://cefasfese.4pu.com/2734730734737738/Unbroken-An-Extraordinary-True-Story-of-Courage-and-Survival-by-Laura-Hillenbrand.pdf
    • http://cefasfese.4pu.com/1731735733731733/Goodbye-Sarajevo-A-True-Story-of-Courage-Love-and-Survival-by-Atka-Reid.pdf
    • http://cefasfese.4pu.com/8734732732739730/True-Stories-of-Courage-and-Defiance-from-the-Salem-Witchcraft-Hysteria-of-1692-by-William-Story.pdf
    • http://cefasfese.4pu.com/8730734732736/Arctic-Homestead-The-True-Story-of-One-Family-s-Survival-and-Courage-in-the-Alaskan-Wilds-by-Norma-Cobb.pdf
    • http://cefasfese.4pu.com/5730734731731730/My-Gutsy-Story-Anthology-True-Stories-of-Love-Courage-and-Adventure-from-Around-the-World-Volume-1-by-Sonia-Marsh.pdf
    • http://cefasfese.4pu.com/1739731736736731/The-Screaming-Room-A-Mother-s-Journal-of-Her-Son-s-Struggle-With-AIDS--A-True-Story-of-Live-Dedication-and-Courage-by-Barbara-Peabody.pdf
    • http://cefasfese.4pu.com/5738734738738731/Almighty-Courage-Resistance-and-Existential-Peril-in-the-Nuclear-Age-by-Dan-Zak.pdf
    • http://cefasfese.4pu.com/4732730735736733/From-noon-till-three-The-possibly-true-and-certainly-tragic-story-of-an-outlaw-and-a-lady-whose-love-knew-no-bounds-by-Frank-D-Gilroy.pdf
    • http://cefasfese.4pu.com/1730734736735735/Shannon-by-Frank-Delaney.pdf
    • http://cefasfese.4pu.com/2731738737737734/Undead-by-Frank-Delaney.pdf
    • http://cefasfese.4pu.com/4731732734739735/The-Last-Storyteller-A-Novel-of-Ireland-3-by-Frank-Delaney.pdf
    • http://cefasfese.4pu.com/2732739733732739/Anne-Frank-a-Portrait-in-Courage-by-Ernst-Schnabel.pdf
    • http://cefasfese.4pu.com/4730739730732/Anne-Frank-Remembered-The-Story-of-the-Woman-Who-Helped-to-Hide-the-Frank-Family-by-Miep-Gies.pdf
    • http://cefasfese.4pu.com/8733733736736732/Another-Unbelievable-Story-from-Frank-by-Frank-Humain.pdf
    • http://cefasfese.4pu.com/2737735735731739/The-Writing-Warrior-Discovering-the-Courage-to-Free-Your-True-Voice-by-Laraine-Herring.pdf
    • http://cefasfese.4pu.com/2738738730736736/Braving-the-Wilderness-The-Quest-for-True-Belonging-and-the-Courage-to-Stand-Alone-by-Bren-Brown.pdf
    • http://cefasfese.4pu.com/3739732734733731/Real-Animal-Heroes-True-Stories-of-Courage-Devotion-and-Sacrifice-by-Paul-Drew-Stevens.pdf
    • http://cefasfese.4pu.com/5730734731731730/My-

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