Malicious PDF — malware analysis report

Static analysis result for SHA-256 20df05181188778f…

MALICIOUS

PDF

36.4 KB Created: 2020-11-08 07:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38c27caaa57b67b6a2c42581629e236a SHA-1: 746402b97fab33628f2020bfeebeb32177c6fcc3 SHA-256: 20df05181188778f6a004db584ab70c69a826c1e55fd6ccdbeef8e1988643ba2
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are presented in a way that suggests a link farm designed to manipulate search engine rankings. The primary external URI points to a URL containing game-related keywords, indicating a lure to potentially malicious or unwanted content. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious sites, likely as part of a phishing or SEO poisoning campaign.

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=pre+civilization+bronze+age+unblocked+games
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/31adeb812716.pdf
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/zidejeme_surujelagedide_dokatamekod_kofawuk.pdf
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/rafepis-banopozuda-xutemonakur-suzavesul.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdf
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/147752.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizuluworafid/14649771681.pdf
    • https://xoxedoxiki.files.wordpress.com/2020/11/vag_kkl_409.1_usb_driver_download_wi.pdf
    • https://s3.amazonaws.com/wiwamoxamo/xixozis.pdf
    • https://zuwumatola.files.wordpress.com/2020/11/61374213042.pdf
    • https://zomotinofi.files.wordpress.com/2020/11/razelowinodu.pdf
    • https://uploads.strikinglycdn.com/files/e492676d-bf85-4cf1-b51d-f18f5c538f8b/trade_restrictions_in_international_trade.pdf
    • https://s3.amazonaws.com/mozirolinitaje/bepiwep.pdf
    • https://s3.amazonaws.com/xoxaneral/22408294494.pdf
    • https://s3.amazonaws.com/tiluwisulepam/adobe_acrobat_pro_change_to_word.pdf
    • https://gudusuk.files.wordpress.com/2020/11/42443222873.pdf
    • https://uploads.strikinglycdn.com/files/6d2fdc9a-4db7-4de6-bf1b-6e91d876080d/sijinuwesejevaduzivilu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f83.bin
5d46cd5f19c0c6c46e30098983f084d4dc7c83669060d1efe6ec5f757059e08c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F83 5576 bytes
font_01_sfnt_off0000626d.bin
7684307b43b73fb6abcf821a9a6b86ceef2a453bc77163a6c25c058552ede5eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x626D 10220 bytes