Malicious PDF — malware analysis report

Static analysis result for SHA-256 4719753762fe10b8…

MALICIOUS

PDF

52.9 KB Created: 2020-11-05 20:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8cea64f7f53ae137612f3ab2d0597210 SHA-1: 210d979d4f46539f3147282ab864d587349ec757 SHA-256: 4719753762fe10b85c4fffae0c4621c20cbbb093835b006db04094f440327c8d
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/123?keyword=battle+mage+skill+build+guide PDF link annotation
    • https://vibupawovilopi.weebly.com/uploads/1/3/4/3/134377541/xanobabeb_mifafupit.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/joralazokeke.pdfIn PDF document text
    • https://busiwilepajij.weebly.com/uploads/1/3/4/3/134353274/5b2860c370ab349.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/lonozote/models_direct_agency.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/desi_tv_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c7f180-5a2f-4cd3-99aa-e601091ed344/xoganezuvukejewegewizu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/god_and_the_state_mikhail_bakunin.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/serejilowerovawidagogopoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/reredajalukudeb.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/22766698106.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/85293996151.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/fapobewodamutimirevixaguk.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/24mm_equal_in_inches.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/com_mini_zombies_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350792df-8afc-4643-bc4b-2c67abd3086b/43408141455.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/1746043052.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/5664138831.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_off00008f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F61 5304 bytes
SHA-256: aa536948109c972931357a9203b82c8e6f2f43b93d78037a80edfb74a6c25ee0
font_01_sfnt_off0000a15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15A 10956 bytes
SHA-256: 7865c52da2fef66c66a581f65661010b2105831124420efb7b01ce3366f64015

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