Malicious PDF — malware analysis report

Static analysis result for SHA-256 054764af2a8ca3ed…

MALICIOUS

PDF

82.7 KB Created: 2021-04-20 05:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e8675a837c140474224c9b186b90e440 SHA-1: 9aeb7d12a2fac84e872e3c7ab7a3ef43208a51ce SHA-256: 054764af2a8ca3edc3514cefe80eabad954cb9636565fb556754d92835ca6da8
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=mary+rowlandson+a+narrative+of+the+captivity+quotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fcdc85e9f5ca.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/Lrcichg/say_hi_korean_kiip_level_1.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/84717258381.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/amazonia_colombiana.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/shark_rotator_professional_lift-away_upright_vacuum_cleaner.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/bUshgfn/34539685395.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/9423394947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5ffc050d98093.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_603b1943da031.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/sanuwidaw.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/ihwsidw/39922326390.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/jvc_vhs_camcorder_tapes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fcfb4a5955ab.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/QhbvgjA/noob_vs_zombie_shooting_games_unblocked.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/sesafefanulokam/the_office_pilot_script.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/structural_isomerism_in_organic_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/xosasasaxe.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/zifutokoritivoririmolabiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd16861-2c33-4e5b-8e6d-4888e0614cc2/can_a_parent_upload_a_video_to_classdojo.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/80359645333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd56f34e-86c1-42ae-acf7-c7bb035f09c0/can_a_crashed_computer_be_fixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ef66f3-4d8f-4c4d-8baf-0ec8310864a2/mujezukisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed27f57-a9fb-4206-9737-19999ec93c47/94588002200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c7bbc9-a2d0-4321-8baa-8967178538c7/14273584146.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_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 5628 bytes
SHA-256: 42a136ca7f11115559717d82ec5f7114b4d86931768e1bbdf494945e39da8b72
font_01_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 10340 bytes
SHA-256: 38359feb0a1424cab5a3788bc956a6ef61ef916532537d3c0fb5e7d819bf8806