Malicious PDF — malware analysis report

Static analysis result for SHA-256 64538271bae97acb…

MALICIOUS

PDF

15.8 KB Created: 2019-05-10 12:34:27 +01:00 Authoring application: mPDF 5.7
MD5: b1485a090d2e9bdfc6e571825d86597d SHA-1: 44c4b7a8973d3c25a8aec0f5c388c93498619f30 SHA-256: 64538271bae97acba32d6be8dbf863f17a22f34bfceab52100bb9e9d73f96cf5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of links suggests a malicious intent, likely for SEO poisoning or to redirect users to malicious content. The primary attack vector is likely Spearphishing Attachment, with the embedded URLs potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/3733732738732731/Broken-Planet-Alpha-2-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/1732738730730731/Alpha-Divided-Alpha-Girl-3-by-Aileen-Erin.pdf
    • http://cefasfese.4pu.com/4731732732735733/Becoming-Alpha-Alpha-Girl-1-by-Aileen-Erin.pdf
    • http://cefasfese.4pu.com/2730730735739734/Bitter-Bite-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/3733738739738734/Karma-Bites-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/3737731732736739/Captive-Fire-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/3736738730735735/The-First-Time-is-the-Sweetest-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/2739739735739736/Lone-Wolf-Bad-Oak-Boys-4-by-Erin-M-Leaf.pdf
    • http://cefasfese.4pu.com/5735732739733/Lumberjanes-Beyond-Bay-Leaf-Special-1-by-Faith-Erin-Hicks.pdf
    • http://cefasfese.4pu.com/3738730734737733/Ruled-Planet-Alpha-10-by-J-J-Lore.pdf
    • http://cefasfese.4pu.com/2730731739735737/Captive-Planet-Alpha-4-by-Pelaam.pdf
    • http://cefasfese.4pu.com/3733732738732730/Proposition-Planet-Alpha-3-by-Beth-D-Carter.pdf
    • http://cefasfese.4pu.com/1738734736732739/The-Alpha-Series-Boxed-Set-Books-1---3-Alpha-Kaden-Alpha-Grayson-and-Alpha-Jasper-by-Midika-Crane.pdf
    • http://cefasfese.4pu.com/1733735739731732/The-Broken-Path-Survivors-4-by-Erin-Hunter.pdf
    • http://cefasfese.4pu.com/4731735739730735/Red-Leaf-Yellow-Leaf-by-Lois-Ehlert.pdf
    • http://cefasfese.4pu.com/9731732735730735/Lonely-Planet-The-World-A-Traveller-s-Guide-to-the-Planet-by-Lonely-Planet.pdf
    • http://cefasfese.4pu.com/9733732731737730/Verbotener-Planet-Warnung-Der-Planet-Erde-befindet-sich-in-Quarant-ne-by-CD-Sanders.pdf
    • http://cefasfese.4pu.com/5735738738737731/Adventure-to-the-New-Planet-The-sequel-to-Fly-to-the-New-Planet-by-Yehong-FanFan-Jiang.pdf
    • http://cefasfese.4pu.com/2737731736730734/Alpha-Bully-The-Alpha-Shifter-Collection-5-by-Sam-Crescent.pdf
    • http://cefasfese.4pu.com/9736732736730739/Alpha-s-War-Bad-Boy-Alphas-7-Bad-Alpha-Dads-by-Renee-Rose.pdf

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