Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd762fb3dad17ae…

MALICIOUS

PDF

17.2 KB Created: 2019-08-02 07:36:49 +01:00 Authoring application: mPDF 5.7
MD5: 1aec705c914881841407002339b2c996 SHA-1: 3231ee2e4455e4429c4f7272343bf79c0f8b7d1b SHA-256: 8fd762fb3dad17aec0ebc205ae0f35147b29d58fb10a117f3c15f7a88b54b593
90 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating a large number of external links embedded within the document. While most of these links appear benign, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, possibly for SEO abuse or to mask malicious redirects. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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/6736732737739/A-Charmed-Life-The-Charmed-Life-1-3-by-Jenny-B-Jones.pdf
    • http://cefasfese.4pu.com/4736731731733736/Why-the-Sky-Is-Blue-by-Susan-Meissner.pdf
    • http://cefasfese.4pu.com/1730734739733739/A-Fall-of-Marigolds-by-Susan-Meissner.pdf
    • http://cefasfese.4pu.com/2732738736734739/White-Picket-Fences-by-Susan-Meissner.pdf
    • http://cefasfese.4pu.com/4739731737732/Widows-amp-Orphans-Rachael-Flynn-1-by-Susan-Meissner.pdf
    • http://cefasfese.4pu.com/1730739737735735734/Charmed---The-ultimate-unofficial-companion-Was-du-schon-immer-ber-Charmed-wissen-wolltest-by-Eva-Maria-H-reth.pdf
    • http://cefasfese.4pu.com/1731733731730/Lucky-Charmed-Charmed-in-Texas-2-by-Sharla-Lovelace.pdf
    • http://cefasfese.4pu.com/7732734733735/The-Charmed-Fates-The-Charmed-Trilogy-3-by-Christine-Wenrick.pdf
    • http://cefasfese.4pu.com/4730731735733735/Charmed-Life-Chrestomanci-1-by-Diana-Wynne-Jones.pdf
    • http://cefasfese.4pu.com/4730734733730732/Charmed-Again-Charmed-11-by-Elizabeth-Lenhard.pdf
    • http://cefasfese.4pu.com/4733734738733732/Charmed-Again-The-Charmed-2-by-Lindy-Zart.pdf
    • http://cefasfese.4pu.com/3738733735738738/Kick-Kennedy-The-Charmed-Life-and-Tragic-Death-of-the-Favorite-Kennedy-Daughter-by-Barbara-Leaming.pdf
    • http://cefasfese.4pu.com/2738735737731738/Secrets-of-the-Tulip-Sisters-by-Susan-Mallery.pdf
    • http://cefasfese.4pu.com/8735738736737739/It-Was-Never-about-the-Ketchup-The-Life-and-Leadership-Secrets-of-H-J-Heinz-One-Life-Can-Make-a-Difference-by-Steve-Lentz.pdf
    • http://cefasfese.4pu.com/2732731734731732/West-by-West-My-Charmed-Tormented-Life-by-Jerry-West.pdf
    • http://cefasfese.4pu.com/7732730730735731/The-Paranoid-Process-by-W-W-Meissner.pdf
    • http://cefasfese.4pu.com/1731732737736739739/DER-STIEFVATER-Gay-Love-by-Leon-Meissner.pdf
    • http://cefasfese.4pu.com/7732730731730739/Psychotherapy-and-the-Paranoid-Process-by-W-W-Meissner.pdf
    • http://cefasfese.4pu.com/5736734735731/Family-Affairs-Secrets-of-My-Hollywood-Life-3-by-Jen-Calonita.pdf
    • http://cefasfese.4pu.com/7733736732730/Get-Happy-7-Secrets-to-Creating-the-Life-You-Want-by-Elizabeth-C-Bruce.pdf
    • http://cefasfese.4pu.com/4733734738733732/Charmed-

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