Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb6c3e2155bd968…

MALICIOUS

PDF

111.0 KB Created: 2021-06-07 09:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 95f9ba6f69c1bb4981b9f688ad2d8f63 SHA-1: c587c8bfdef34ea29b7b37ca2e4f51f5ce4ee577 SHA-256: edb6c3e2155bd96835f3a76903f6c45b910d84a1c5a212170288b68cb357a436
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or use UTM parameters, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://huntic.ru/pbw?utm_term=2013+form+1040+schedule+c+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365525/normal_6036de0b49850.pdfIn PDF document text
    • https://pulakaxumif.weebly.com/uploads/1/3/0/7/130776647/riwir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_6067cd27d6f26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5fde5abc24c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fd7f54d6bfbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_605590dd8cf5f.pdfIn PDF document text
    • https://vetexugosopaviz.weebly.com/uploads/1/3/0/7/130738505/rutud.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/b22daeae-0d6f-4759-9416-28929c6ae58e/english_course_for_adults_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3e3b71-05ad-4334-b877-3e165947290a/26807015208.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144605448/google_contact_support_live_chat.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144736845/43828444671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d342b42-9781-46fd-be4d-932cfdfa8670/56437566828.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144423243/55649579015.pdfIn PDF document text
    • http://mutoteja.pbworks.com/f/food_web_worksheet_answers_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05811ac0-a0c9-4553-8e8e-04a52caab8f4/86851477892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9a8a85-1901-4f80-b63c-6a96a387e470/male_vikings_season_2_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962b5a49-9778-4be5-a949-243558a1e6a2/twilight_saga_breaking_dawn_part_2_soundtrack_download_in_tamil_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0878d9b0-d5d2-44a6-94b0-435a618674d1/vuletira.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/dominion_power_pay_bill_by_phone.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/f/71711611272.pdfIn PDF document text
    • http://tovovojufa.pbworks.com/f/my_etisalat_app_esim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a3acd5-1882-4552-a6b3-136e47a20f81/what_is_an_inclined_manometer_used_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e84d2ae-758f-47a2-8772-24a8bea381a6/91033868724.pdfIn PDF document text
    • http://komogabovuwa.pbworks.com/f/sitamowaxu.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_off000174f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F5 5536 bytes
SHA-256: 221ce732d892d2768d305cd2e3538f658578ddbaf4a05ef07b83f01251032c02
font_01_sfnt_off000187ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187AD 11164 bytes
SHA-256: 0a054c04505d2156375e4c3387403825f4d793a3d3c6e6cf8809ab3ffe6f6014

Open this report in the interactive analyzer, or submit your own file for analysis.