Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf2cfd5f294d7b3…

MALICIOUS

PDF

74.6 KB Created: 2021-03-30 15:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 790144d67dbfe1a58cb943fefd241e08 SHA-1: 1932436161a8ff04f115c958f546dc73d6290a3e SHA-256: edf2cfd5f294d7b37ce9492dc489e6850b4d31ab53eb69c518232558b4584598
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=nightjohn+movie+cast PDF link annotation
    • http://ganoget.scienceontheweb.net/joint_venture_accounting_in_sap.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/caryl_churchill_cloud_nine.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/is_gni_better_than_gdp.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/juwugujuwaxiluribotojufak.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/xijalovelokolep/characteristics_of_living_things_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac46c2a-5547-4c86-aab7-f48dc3e5df1d/sentry_1250_safe_instructions.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/caesar_and_cleopatra_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cf76e9-e115-4401-a298-6d405dbd1fdb/how_to_set_date_on_eco_drive_citizen_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e034190-d23b-4546-9ab4-5030f2d5cf6f/pitifit.pdfIn PDF document text
    • http://warunero.rf.gd/what_is_the_importance_of_data_structure_in_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/72480612437.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_ef33bb4f55fb457895b365fa3f63af7e.pdf?index=trueIn PDF document text
    • http://nejexapef.rf.gd/bruce_lee_film_enter_the_dragon.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_77e995d4ad7e42278ad7621e7abfe53d.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_68aaeb019f794982b1f10e17406df1d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/zulekovunonefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d63ec9-d711-4b26-afc2-bc5dce394fcc/79311168692.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/ballast_water_management_plan_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162eefbd-8188-4503-bbe7-fd37b597e2ac/excalibur_food_dehydrator_instruction_manual.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_3117c66034a04bc48664f57892cddaa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/keniluwafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c55943-92ed-4ad6-9f00-7fd6640a3469/72221337558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1191eed-f60d-4179-8826-115954070ce8/why_i_am_not_a_hindu_by_kancha_ilaiah_summary.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_e64c77fb26534ae48ec7769cdc54ed28.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_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 5192 bytes
SHA-256: 05147e24f92292d291f6c9bf97e1b9d7a612d576c33d87db251ed7bfe61e64d6
font_01_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 11184 bytes
SHA-256: 79dcaba33d754de58746e47dec0f3300b6957b72c2e2b1084e25303ce4c4ce2b