Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d11273be3a61604…

MALICIOUS

PDF

76.0 KB Created: 2021-05-14 03:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 749cd7812a651b947d0c3a1d6f3d9c56 SHA-1: 229b847e97ac93be11d6bae90c8525db733efcb2 SHA-256: 2d11273be3a616042c5389b111c9eefed4c7b917e6cf361925efe7de38694a3d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to SEO spam or directing users to malicious sites. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=what+are+the+benefits+of+listening+skills PDF link annotation
    • https://cdn.sqhk.co/ditetona/T0luDxn/jiffy_lube_south_portland_maine.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/1o4Wb4u/94213657585.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/2963642.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/6jijbje/67233777316.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/hNfoehd/pocket_knives_for_sale_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/iigjeKH/conceptual_physics_workbook_answers_chapter_9.pdfIn PDF document text
    • https://vujedivu.weebly.com/uploads/1/3/4/7/134768767/kawumolonapogew-segivixex-xisidoverokoji-vebur.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/8102484.pdfIn PDF document text
    • http://argo-tourism.com/sherlock_holmes_a_game_of_shadows_full_movie_download_in_hindi_hd94kuz.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/jeratubaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/ggvfjgE/battle_for_the_planet_of_the_apes_imdb.pdfIn PDF document text
    • https://zeniladafisu.weebly.com/uploads/1/3/5/3/135320186/8424368.pdfIn PDF document text
    • http://fastnoutservice.ru/across_the_stars_piano_sheet_music_freeoh774.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/iaia2gc/xosazugebopamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7d33af4c-acfd-4996-9436-348e89828b5b.filesusr.com/ugd/289672_8895e1b201ca457384be47885cda2d9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/fijofezadekikaroleb.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_a39d75c7a6044778b3da35a395fcb214.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_b9110387b2484bcaaf4c84c28b9e11cf.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_7cf31f36fd7946f591b376262956b4f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piradi/go_go_scooter_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/warhammer_fantasy_roleplay_3rd_edition.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_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 5244 bytes
SHA-256: 36b0db160a1557b933e6e6d7dbda6316c86a05dd9491eb0ddce4451237a37707
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 10540 bytes
SHA-256: a6e5e4e55344ee9485a09d52bfd0a95d3f8fd36459346ea024acef2c960cbf0d