Malicious PDF — malware analysis report

Static analysis result for SHA-256 0360b4b005b99b53…

MALICIOUS

PDF

79.9 KB Created: 2021-04-20 02:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11bc14677d3644f2b9a3e7dec379ff8e SHA-1: de8be8f33d5fe981d0a1a440c42aa20487604be1 SHA-256: 0360b4b005b99b53ce62ea1a081423cd7f4fa79c6c7d537bfdb156f232a3e8d4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=dungeon+master%2527s+screen+reincarnated+amazon PDF link annotation
    • https://cdn.sqhk.co/buzomesil/hagiehd/32165966453.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/5362254.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/3941296.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/jgQgggc/12887093053.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/IKgcohd/rufur.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/46894355316.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/naxomukifadisobibap.pdfIn PDF document text
    • http://zarumesa.mypressonline.com/tubuxusebinazumopep.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/9703079.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/hbhix2H/dress_up_battleship.pdfIn PDF document text
    • https://nenafefetu.weebly.com/uploads/1/3/1/4/131406263/voriguwezemafal.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/1631910.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/cgrjeZz/elifoot_2002_dicas.pdfIn PDF document text
    • https://xexomogaju.weebly.com/uploads/1/3/1/4/131438449/d86bbb717ac.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/espresso_english_grammar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/why_were_the_spanish_armada_defeated.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/orion_chiller.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vidmate_latest_version_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/zapenawezet.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/time_management_for_dummies_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/constipation_guidelines_aga.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/spotify_web_player_songs.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/30618292346.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_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 5308 bytes
SHA-256: d4964fa65160ae489576766ae25c7b9d5e2c70debdc78cfadc3d1d5fa3a624d4
font_01_sfnt_off00010cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFA 10840 bytes
SHA-256: 23e5c8dafa8c6fa1f292f46ed69c0bc7f07ef5811283e77c42604cd32b7ae3fd

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