Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7a288e7e25755d…

MALICIOUS

PDF

76.5 KB Created: 2021-04-03 01:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b6b99936493455ea2d4cced577253790 SHA-1: 767ec1df2c371d02cc8fc2b0c7a498075188f0b1 SHA-256: ae7a288e7e25755d57b7cc0544479f2a9347761dacea493535562f030279e2c4
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru'. The document body, though heavily obfuscated, suggests a lure related to a TV show, likely to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=does+camila+appear+in+season+4 PDF link annotation
    • https://cdn.sqhk.co/wuvakumo/WKC7hct/weathertech_cyber_monday_deals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6064f25c7d296.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/kabokefuzu_buboxa.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/mupuruzadinug-zekopowijino-letomemafew.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/P5iergf/26841997182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd0fdd90b749.pdfIn PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/fexajodazaluzi.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/uQojif5/verizon_cloud_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/jjqEAhb/modern_combat_4_zero_hour_pc_game_download.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/muverodolufek.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/4a2fdcfc67aae49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/248cda40-5f5c-4e0e-8846-259cf97dc087/top_shadow_work_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b55ed1a-cd62-460d-a67b-5bcda850850b/20532100535.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/51691113799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2979a07-c308-42f0-a7a5-92dcf2f7b733/why_is_my_sony_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3615bd-a7e7-49d8-8313-442a5f0f47d2/40194341239.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/how_to_make_apple_smoothie_recipes.pdfIn PDF document text
    • http://womopudajate.epizy.com/asthma_drug.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/36236801419.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/lesozovitodoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf393786-a39b-4cca-8268-87ad08b55904/85459079024.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/majamunitovujopo.pdfIn PDF document text
    • http://riwuzapivegeb.rf.gd/game_templates_html_free.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_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 5168 bytes
SHA-256: f4703417ce1e618ea5d8d60b7e215fd938e754b1ed58b9822071686c0b97ca18
font_01_sfnt_off0000fe1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1B 10756 bytes
SHA-256: 8db1c6ac10283df6c9d1874a7ac7931378d0c676e5a04cacf3f4b025a8538cc4

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