Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3abe3b678ead42…

MALICIOUS

PDF

23.4 KB Created: 2019-04-30 03:54:51 +01:00 Authoring application: mPDF 5.7 First seen: 2021-08-20
MD5: f113b861fa56a436d9a3c80c3b106ee4 SHA-1: 67d115268d8f7980b10787571ec21f17476e63b2 SHA-256: 5f3abe3b678ead42115960472af764fd4632e4b05fb71c903d2d43a512f4b9a2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, which is a common technique for SEO poisoning or distributing malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While the specific intent of the links is unclear due to their benign reputation labels, the overall structure suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://muicuiu.dumb1.com/1a01a07a01a02a07a07/Dr-Stefan-Frank---Folge-2336-Wir-heiraten-heimlich-und-allein-by-Stefan-Frank.pdf In PDF document text
    • http://muicuiu.dumb1.com/9a08a03a08a06a02/Maria-Stuart-v-llig-neu-bearbeitet-reich-bebildert-zahlreiche-Einf-gungen-Stammtafel-Stefan-Zweig-B-cher-8-by-Stefan-Zweig.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a09a03a01a02a07/Fort-Aldamo---Folge-031-In-Manolitos-Todesfalle-by-Frank-Callahan.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a03a03a09a02a01/Just-Cooking-Kristof-amp-Stefan-Boxy-Kristof-amp-Stefan-Boxy-by-Bart-van-Leuven.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a08a04a02a01a07/May-I-Be-Frank-How-I-Changed-My-Ways-Lost-100-Pounds-and-Found-Love-Again-by-Frank-Ferrante.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a09a06a06a02/Study-Guide-For-Anne-Frank-Remembered-The-Story-Of-The-Woman-Who-Helped-To-Hide-The-Frank-Family-With-Related-Readings-by-Miep-Gies.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a08a00a01a04a00/El-diario-de-Ana-Frank-Biling-e-by-Anne-Frank.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a03a03a06a06a02/Another-Unbelievable-Story-from-Frank-by-Frank-Humain.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a01a02a04a04a06/Anne-Frank-s-Tales-from-the-Secret-Annex-A-Collection-of-Her-Short-Stories-Fables-and-Lesser-Known-Writings-by-Anne-Frank.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a00a00a03a04a06/Frank-Schafer-Alle-Meine-Manner-Ein-Schwuler-Friseur-Vom-Prenzlauer-Berg-Berichtet-by-Frank-Sch-fer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a00a07a08a03a01/Frank-Stitt-s-Southern-Table-Recipes-and-Gracious-Traditions-from-Highlands-Bar-and-Grill-by-Frank-Stitt.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a02a01a03a05/The-Last-Seven-Months-Of-Anne-Frank---The-Stories-of-Six-Women-Who-Knew-Anne-Frank-by-Willy-Lindwer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a04a04a05a00a09/Anne-Frank-The-Anne-Frank-House-Authorized-Graphic-Biography-by-Sid-Jacobson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a09a03a04a04a07/The-Wonderful-Wizard-of-Oz-By-L-Frank-Baum---Illustrated-Comes-with-a-Free-Audiobook-by-L-Frank-Baum.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a03a03a00a01a07/Dr-Heimlich-s-Home-Guide-to-Emergency-Medical-Situations-by-Henry-J-Heimlich.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a07a03a09a05a01/The-Diary-of-Anne-Frank-Original-Dutch-Version-by-Anne-Frank.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a09a00a02a08/The-Light-the-Dead-See-The-Selected-Poems-of-Frank-Stanford-by-Frank-Stanford.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a00a06a00a08a08/Daredevil-by-Frank-Miller-amp-Klaus-Janson-Vol-3-by-Frank-Miller.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a05a07a01a01/Anne-Frank-The-Diary-of-a-Young-Girl-by-Anne-Frank.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a01a01a05a02/Frank-Miller-s-Complete-Sin-City-Library-by-Frank-Miller.pdfIn PDF document text

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