Malicious PDF — malware analysis report

Static analysis result for SHA-256 7836eb40754d516f…

MALICIOUS

PDF

49.2 KB Created: 2020-11-06 13:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e855ff91cf8925ae4418f3654c433cd5 SHA-1: d27e53e72edf5013c3c7ca5596d38ef1ff93e122 SHA-256: 7836eb40754d516fe9fc22ad56dfb47edc1541274a4bf0339af9d2c0d6cdc5c5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://trafftec.ru/aws?keyword=mage+the+ascension+combining+spheres PDF link annotation
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/5760496.pdfIn PDF document text
    • https://sagoxanoku.weebly.com/uploads/1/3/4/3/134350044/petez.pdfIn PDF document text
    • https://nivozigagu.weebly.com/uploads/1/3/4/4/134439663/baxab.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/6359122.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/what_is_mmdcxli_roman_numeral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62728fc8-dfdb-43b9-acee-31c4f8f6b3cb/napavanapevawelor.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dante_alighieri_boska_komedia.pdfIn PDF document text
    • https://s3.amazonaws.com/goporo/2825429523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c13fd2a-9ec7-4b65-bca0-9418a19bf3fa/14943068556.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/danilodajuvowetulasitim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836dbf8b-5810-4b00-9812-63b0d119246a/mularewaporaxumogute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa3ef31-ddf6-482e-8906-15001781a317/salama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d968d96-809d-4b32-acd5-765d421b6bf3/32521598417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbdca743-9fe9-4b1a-9698-d7e1b2c41c1c/62479643804.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D4 5460 bytes
SHA-256: 3ecb2faf8264974b7cd52cc1ed87d837516d62991c5a36abe69aabb9ae91c7f5
font_01_sfnt_off00009747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 9504 bytes
SHA-256: 0e801479b0f4f509f65052033e0c519ad5c0f0ac4ce20605b5af53a1051becfe

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