Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd2bb7d3a48c5e1…

MALICIOUS

PDF

17.1 KB Created: 2019-08-02 07:36:35 +01:00 Authoring application: mPDF 5.7
MD5: bb26a9ff128d83f8d1c990e9ccb54717 SHA-1: 0b135a3dcbd8571652001c003c0dc0e3d4dcacb3 SHA-256: 8fd2bb7d3a48c5e1a8ac4c9def2add5dfceca81b3689a74f990744a9bea58a0c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute 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 heuristic firing suggest a malicious attempt to drive traffic or host harmful content. No scripts were extracted from this sample.

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://cefasfese.4pu.com/3738734737735/The-Woman-Who-Married-a-Cloud-The-Collected-Short-Stories-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/8737736739730/The-Collected-Stories-of-Lewis-Carroll-Alice-in-Wonderland-Through-the-Looking-Glass-Phantasmagoria-by-Lewis-Carroll.pdf
    • http://cefasfese.4pu.com/4731736734735/Collected-Short-Stories-Volume-2-Collected-Short-Stories-of-W-Somerset-Maugham-2-by-W-Somerset-Maugham.pdf
    • http://cefasfese.4pu.com/2736732735735/The-Panic-Hand-Stories-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/3738737737737730/The-Collected-Short-Stories-by-Jean-Rhys.pdf
    • http://cefasfese.4pu.com/4736736734734/Collected-Short-Stories-by-Jeffrey-Archer.pdf
    • http://cefasfese.4pu.com/4734734735739739/Collected-Short-Stories-Volume-4-by-W-Somerset-Maugham.pdf
    • http://cefasfese.4pu.com/3733733738731730/Stories-The-Collected-Short-Fiction-by-Helen-Garner.pdf
    • http://cefasfese.4pu.com/3732736739733731/In-the-Shadows-of-the-Onion-Domes-Collected-Short-Stories-by-Mary-Pat-Hyland.pdf
    • http://cefasfese.4pu.com/2732731736733733/A-Day-in-the-Life-of-a-Smiling-Woman-Complete-Short-Stories-by-Margaret-Drabble.pdf
    • http://cefasfese.4pu.com/4735730738738733/To-Room-Nineteen-Collected-Stories-Collected-Stories-Vol-1-by-Doris-Lessing.pdf
    • http://cefasfese.4pu.com/5730731736739736/The-Collected-Short-Stories-of-Louis-L-Amour-Volume-7-The-Frontier-Stories-by-Louis-L-39-Amour.pdf
    • http://cefasfese.4pu.com/2738737733730732/The-Collected-Short-Stories-of-Louis-L-Amour-The-Adventure-Stories-by-Louis-L-39-Amour.pdf
    • http://cefasfese.4pu.com/1734735734734730/A-Married-Woman-by-Manju-Kapur.pdf
    • http://cefasfese.4pu.com/2736732739731/Uh-Oh-City-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/4731733733739730/Bathing-the-Lion-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/3730737734731734/Voice-Of-Our-Shadow-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/2736733732732/Black-Cocktail-by-Jonathan-Carroll.pdf
    • http://cefasfese.4pu.com/3732735730736732/The-Collected-Short-Stories-of-Roald-Dahl-by-Roald-Dahl.pdf
    • http://cefasfese.4pu.com/4732734737733/The-Woman-Who-Married-a-Bear-Cecil-Younger-1-by-John-Straley.pdf
    • http://cefasfese.4pu.com/4734734735739739/Collected-Short-Stories-Volume

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