Malicious PDF — malware analysis report

Static analysis result for SHA-256 c618a2398ed7596d…

MALICIOUS

PDF

79.9 KB Created: 2021-05-22 08:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cdabb57b630ce22513451f3411819b44 SHA-1: 801b03feca603155a1f7f473c4b68c2fbee2aee1 SHA-256: c618a2398ed7596dd6c24eba40cf3fee1e0bd219e5cd60ca67130b08b0446416
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or link farm attack, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. It contains numerous external links, including one to `https://xezojetit.ru/strik?utm_term=pokemon+fusion+random+number+generator`, suggesting an attempt to redirect users to malicious or spam content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=pokemon+fusion+random+number+generator PDF link annotation
    • https://bukanunale.weebly.com/uploads/1/3/5/9/135974016/4446024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5ff76d9c8dfe6.pdfIn PDF document text
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/1552564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_606ea8a4acdc7.pdfIn PDF document text
    • https://zisumujabi.weebly.com/uploads/1/3/5/3/135315444/tebivevujamuk.pdfIn PDF document text
    • https://ginozupil.weebly.com/uploads/1/3/1/4/131411281/kedobezavumamamimis.pdfIn PDF document text
    • https://lupipoga.weebly.com/uploads/1/3/4/4/134402738/fuxeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_60533ceb60e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_602576873ffe8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c36aa2-5753-4594-9a53-fc64c3b096fe/zexeramifux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d173e590-43b2-405f-bc9e-7e0457e34147/cia_assassination_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91992f51-8043-4341-b930-6e0d1d91da20/sowutekabeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a95cc3-f6d3-421c-904a-94cbd278c310/13413993403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02faa91f-15e7-40fc-94a6-85cf20e578b6/niziwogiwagajowarewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e84c12d-b437-4a2e-972a-50d4599ce305/what_is_map_projection_simple_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4278c9e-8e8f-4be3-8211-6093efbc0e4e/xupituramu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68807089-6ee2-4ce7-aecd-db2936895eb2/why_samsung_ice_maker_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f37db6-8653-4f9f-b563-cf9c1d284523/mesevabunitipigigepivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b8c8b4-90de-4190-b7d0-0d9491b962ab/badaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4da3f38-ce74-49a8-af43-cc0833b946ef/are_there_any_recalls_on_2010_chevy_equinox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1905eccd-5307-4be9-8b37-123156da9eee/hp_stream_11_pro_g5_11.6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f44fa4e-c14b-4679-baa8-20dbd3010292/how_to_clean_a_oreck_air_purifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a159e415-51d8-46ed-9843-140e525bc7ff/bunn_axiom_twin_airpot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e043bee-42dd-49ce-8609-117655fb5e10/sportspower_arcadia_metal_swing_set_anchors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff27fbf0-2b97-4101-999d-5ac51e274e90/52082957819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf178e5-11b0-439d-b06d-1a5547347ae8/zisuwififabadom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d23f24c-d2a2-4e8b-858c-7b2bc00ce3bb/41309994707.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_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 5400 bytes
SHA-256: 1543308d39d4ef04c95e2568363ca9241729c496b25fbe3def02fa3d585a5fa5
font_01_sfnt_off00010af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF7 11332 bytes
SHA-256: 20bd30e872f3c6b23322007afe3ac5bbc2b5ac010656eedfe18823262f5aad93