Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce64e93ca3e188a…

MALICIOUS

PDF

82.4 KB Created: 2021-04-17 23:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5b2d68262aaa85bb7180cfcf98eb963 SHA-1: dcfcba84b27eaa409d177a93ed66fd39c0745191 SHA-256: fce64e93ca3e188a87fd40bc2e00b24f401ea7d5a2d1008329b4ab0cf16dc82b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The primary URL, https://mezovuduw.ru/strik, appears to be part of a phishing or malware distribution campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=pressure+transducer+symbol+electrical
    • https://cdn.sqhk.co/natokaze/6gfJhfj/80419243149.pdf
    • https://cdn.sqhk.co/guzufaseba/kKiggiH/rdr2_homestead_stash_sean.pdf
    • https://fomodefoz.weebly.com/uploads/1/3/5/9/135958111/mokosukikabe.pdf
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/2f89c370aea4.pdf
    • https://cdn.sqhk.co/taxodisilif/oxlXESE/jarulezopa.pdf
    • https://cdn.sqhk.co/teketerep/gQhhhgW/living_alone_2_boyfriend.pdf
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/gegom.pdf
    • https://dodizavezoku.weebly.com/uploads/1/3/1/3/131398251/varojojuvixegi_bibakereb_tesinizu_parefufun.pdf
    • https://cdn.sqhk.co/mowogibewu/ii0Jkhh/4433262356.pdf
    • https://cdn.sqhk.co/kapipota/jdXRUib/fewesudokeg.pdf
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/towivukigotokikawa.pdf
    • https://cdn.sqhk.co/kamozipu/W8CQihQ/new_york_double_decker_bus_tour_map.pdf
    • https://cdn.sqhk.co/kujusiru/lhdjxYF/summer_nails_2020_blue.pdf
    • https://cdn.sqhk.co/nasanoroge/hcggaha/bubble_bird_rescue_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/vozevadijut/hgydnjj/the_walking_zombie_2_zombie_shooter_apk_obb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6759ff1e-281a-4e53-a20a-4fc15dbb476c/dyson_dc18_slim_parts.pdf
    • https://uploads.strikinglycdn.com/files/1acc6c38-03ec-49b9-a62f-f44e3ad241b2/greetings_in_arabic_with_english_translation.pdf
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_4f52195984414284ab99a584f0247af1.pdf?index=true
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_03a86c7e8eb94c03a9dd94026e2b04ce.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0918838a-1096-4a9b-9706-c6d5b8a6bf27/zotebujugulopofaxugijenog.pdf
    • https://uploads.strikinglycdn.com/files/44e38d08-2de1-4931-87d1-13cd34087998/rawutofikawozom.pdf
    • https://uploads.strikinglycdn.com/files/0ad57211-d7f0-4012-9263-38caf9857a6d/30865411665.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_off00010277.bin
c394106b39f881f747bfe3c26a5eef3d78db3948a26eabb53f47a61efbd31312
pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 5328 bytes
font_01_sfnt_off00011483.bin
503566bc5159cdba7f403a36a31f406ccdb2924b563f2bf22a6f48bff57d2f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x11483 11468 bytes