Malicious PDF — malware analysis report

Static analysis result for SHA-256 6768875a1d7d921f…

MALICIOUS

PDF

79.7 KB Created: 2021-05-02 09:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 447843d258b45201913e7ce36db70fc5 SHA-1: 1cc35a43451c9f2969427aaf61f57a2707cba8f9 SHA-256: 6768875a1d7d921f7b40611b94bfea43b2ba9712671f08da2af9232dcd2964c1
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, with a primary malicious URL pointing to 'maypoin.ru'. The document body, though heavily obfuscated, suggests a lure related to 'operations management'. The presence of many links on disposable hosting indicates a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=how+to+explain+operations+management PDF link annotation
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/silivelexirizux-fuletipeniw-lobukir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417664/normal_5feb6b3a14cc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_6007a2f10d1e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_6037428763bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_60264aab26b65.pdfIn PDF document text
    • http://daniele.store/fufapitetuvixilotanatinuzjlu3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5fca2ce22b2ad.pdfIn PDF document text
    • http://carishr.com/87282197394ke3lh.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/easy_pencil_drawings_step_by_stepg6j23.pdfIn PDF document text
    • https://xefagopabori.weebly.com/uploads/1/3/1/3/131379938/93918751ae4c.pdfIn PDF document text
    • https://zejewovelopitut.weebly.com/uploads/1/3/0/8/130813539/c8ccfae06d8a598.pdfIn PDF document text
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/3244390.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/volutobozegupeb.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/mavixu/57322846957.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/inverses_of_linear_functions_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091aea97-4dcf-4431-b2b9-5a9c7339b2e8/z_table_4_decimal_places.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd78b51d-09d9-47cf-abd4-1ef2f9737cf5/ti_34_ii_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/66485659785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20bb2179-1ec8-4f4e-bd55-16aaebb5fb22/19344216380.pdfIn PDF document text
    • http://bexotomilobawa.epizy.com/internet_speed_meter_software_for_pc.pdfIn PDF document text
    • http://wuniwivufe.rf.gd/carcel_federal_san_juan_puerto_rico.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_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 5260 bytes
SHA-256: 013e1f5b7e8ba9438860f115e44c809f465139fd37ab25142bca25ef55b3c5d9
font_01_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 10220 bytes
SHA-256: 1ab208e07d9338bf4576b0fa87f287280dd4c854a9cfb6aa72f8b61fb4c7eec4

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