Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf39d0d1c79b100…

MALICIOUS

PDF

16.2 KB Created: 2019-04-30 17:37:18 +01:00 Authoring application: mPDF 5.7 First seen: 2020-08-25
MD5: 2458bd675d769435bf2d05d1fe74f621 SHA-1: 4d607e4cd5ac81869f5d8d3f669792176eb59151 SHA-256: ecf39d0d1c79b100367800bc48ac743526742fd282c1004381e5b9a693f55ede
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the heuristic firing suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://loaminoo.linkpc.net/6090098096096/The-Complete-Stories-of-Theodore-Sturgeon-Volume-1-The-Ultimate-Egoist-by-Theodore-Sturgeon.pdf
    • http://loaminoo.linkpc.net/6094090091099095/The-Complete-Stories-of-Theodore-Sturgeon-Volume-III-Killdozer-by-Theodore-Sturgeon.pdf
    • http://loaminoo.linkpc.net/6094090091093093/The-Worlds-of-Theodore-Sturgeon-by-Theodore-Sturgeon.pdf
    • http://loaminoo.linkpc.net/8094094092090098/Mer-n-M-nniska-by-Theodore-Sturgeon.pdf
    • http://loaminoo.linkpc.net/2095091096092/The-Dreaming-Jewels-by-Theodore-Sturgeon.pdf
    • http://loaminoo.linkpc.net/5099096094097093/Edmund-Morris-s-Theodore-Roosevelt-Trilogy-Bundle-The-Rise-of-Theodore-Roosevelt-Theodore-Rex-and-Colonel-Roosevelt-by-Edmund-Morris.pdf
    • http://loaminoo.linkpc.net/3094092090095093/Millie-s-Rose-by-Donna-Sturgeon.pdf
    • http://loaminoo.linkpc.net/3094092097098097/Millie-s-Rose-by-Donna-Sturgeon.pdf
    • http://loaminoo.linkpc.net/1096094097098091/Tale-of-a-Great-White-Fish-A-Sturgeon-Story-by-Maggie-de-Vries.pdf
    • http://loaminoo.linkpc.net/7097092099091096/Theodore-Dreiser---Sister-Carrie-quot-In-Order-to-Have-Wisdom-We-Must-Have-Ignorance-quot-by-Theodore-Dreiser.pdf
    • http://loaminoo.linkpc.net/1090093097098093095/The-Ballades-of-Theodore-de-Banville-by-Th-odore-de-Banville.pdf
    • http://loaminoo.linkpc.net/9096094092090/Theodore-Roosevelt-An-Autobiography-by-Theodore-Roosevelt.pdf
    • http://loaminoo.linkpc.net/2093092099092095/The-Cay-by-Theodore-Taylor.pdf
    • http://loaminoo.linkpc.net/1094094094097/The-Cay-The-Cay-1-by-Theodore-Taylor.pdf
    • http://loaminoo.linkpc.net/1090099098099092/Timothy-of-the-Cay-by-Theodore-Taylor.pdf
    • http://loaminoo.linkpc.net/1096090095096/Outlanders-by-Theodore-Weiss.pdf
    • http://loaminoo.linkpc.net/1096093090093/Praise-to-the-End-by-Theodore-Roethke.pdf
    • http://loaminoo.linkpc.net/1091096099093097092/Banking-by-Theodore-A-Platz.pdf
    • http://loaminoo.linkpc.net/2092092094091096/Kennedy-by-Theodore-C-Sorensen.pdf
    • http://loaminoo.linkpc.net/1093090094092091/Flicker-by-Theodore-Roszak.pdf
    • http://loaminoo.linkpc.net/1096094097098091/Tale-of-a-Great-Whit

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