Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f7eadc18ff42ac…

MALICIOUS

PDF

73.8 KB Created: 2021-03-20 09:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dde9572d29ae17ab609217026936334e SHA-1: 74a7cc7e387d5f58dd04b5c6b869135f1ae2f0ce SHA-256: d7f7eadc18ff42ac24d6f2a9fc759ca38140cdac504a169a740b938459a97f62
126 Risk Score

Malware Insights

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

The PDF document contains a URL that redirects to a disposable hosting service, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=how+to+size+radiant+heaters PDF link annotation
    • http://timecodes.net/jasuzesudedizojodo177ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_6054c6c755aa4.pdfIn PDF document text
    • http://fruct.space/bastien_piano_basics_primer_a4dpzp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_603a6b4aefe10.pdfIn PDF document text
    • http://www19216801.site/wiwivimumuvad4n0sz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5fce9d0f35948.pdfIn PDF document text
    • http://rezonansmusic.com/autocad_tree_blocks_dwg_freeeieym.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_b02208d3caff41cf81c34d1f76b5478a.pdf?index=trueIn PDF document text
    • http://lugubukegi.epizy.com/top_paid_android_apps_kickass_2018.pdfIn PDF document text
    • http://fevumuweli.rf.gd/difference_between_bacterial_and_viral_chest_infections.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/only_fools_and_horses_quiz_with_answers.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_d56016b7f996446f94d84073151ab71f.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_5566b1dd6b1948a0aaa9380b99705afc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libosokune/free_word_search_games_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7164110b-26dd-42cb-8599-ac912047fbeb/a_textbook_of_chemical_engineering_thermodynamics_by_k._v._narayanan.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/gipapawafefipafano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d34a8a-de83-41f1-b099-984f44b55738/attack_on_titan_season_3_part_2_summary.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_e51b487ab16a4081b3ef534077f0717f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ca168d-979f-4fc7-bf0c-d5b63ea40253/kunavasosibononuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41659a4d-580b-492b-bdf3-9aed1cd2a51d/how_to_use_lg_front_load_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/mukanun.pdfIn PDF document text
    • http://rijewetevoxo.rf.gd/anna_digilio_guided_reading_lesson_plan.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_064a85527d6e4bb7afa958ac5aa4cf85.pdf?index=trueIn 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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 4984 bytes
SHA-256: 32008baf785dbdd7102fd4621213d922b3d3af6d022c429549801491d1c14b7e
font_01_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 12184 bytes
SHA-256: 2b48069c147ecb673f2296d27828c5cf91b16853b2c1bb0f7385f34fb743b081