Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec72c0e8c331b8b…

MALICIOUS

PDF

36.8 KB Created: 2020-06-12 05:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8a69426dcaa4202ac297d3da16719d SHA-1: 65d37d3d42de4a737e95f4e5e84ec048e0a3505d SHA-256: bec72c0e8c331b8b14813aa696785faa3e5f87981780444c85dfa9243c2ee265
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which are hosted on domains suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains text related to a 'boost controller manual' and includes URLs that are likely part of this lure. The ML classifier strongly indicated maliciousness, supporting the interpretation of these links as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://captureyourhistory.com/uploads/1/3/1/8/131871609/131871609.html#hks+evc-s+boost+controller+manual
    • http://transportboatyacht.com/uploads/1/3/1/3/131383679/2bced596e9d110e.pdf
    • http://export-import.mn/uploads/1/3/0/8/130813372/lutigeko-boroz-zolowu.pdf
    • http://vallesia.ch/uploads/1/3/1/4/131406182/fifexujo.pdf
    • http://notyourshop.com/uploads/1/3/1/8/131857334/886308f.pdf
    • http://reflectionssublease.com/uploads/1/3/1/4/131483126/nutotebej_visefegiw_lufuretetafizu.pdf
    • https://nimufubaleb.files.wordpress.com/2020/06/dogawatofipi.pdf
    • https://pujobat.files.wordpress.com/2020/06/76147913454.pdf
    • https://polifad.files.wordpress.com/2020/06/kupefifoduk.pdf
    • https://wopigumu.files.wordpress.com/2020/06/jonapis.pdf
    • https://pixudefixig.files.wordpress.com/2020/06/13618517529.pdf
    • https://vumuwifiw.files.wordpress.com/2020/06/73341665738.pdf
    • https://nekewinijum.files.wordpress.com/2020/06/55296662661.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627c.bin
50a91e1843668c4a1ae7c8c772a08776fcbac9ae9b262b9a93c68a146c295a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 10904 bytes

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