Malicious PDF — malware analysis report

Static analysis result for SHA-256 9295304e0cd900bb…

MALICIOUS

PDF

68.0 KB Created: 2021-03-29 14:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 62d471c75e831e0b73597ca5b75832de SHA-1: c0e39c456457d1005375608c2786cbbd615ebf4e SHA-256: 9295304e0cd900bb611fe0154bd290495684db3c60f28c14eabf832f864c367d
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to a calendar, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=greenville+county+schools+calendar+2020-21 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5ff66fad7cb1e.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/bapujidipetom.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/hcKhhha/wings_and_things_menu_ripley_ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_602de5b033de4.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/d6FEXd3/65407388704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_605bab2d9c03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_600dfd72107fb.pdfIn PDF document text
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/lilumasijitelit-gigogixosowafas-bobatew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60350b308de54.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/nagowotuxol.pdfIn PDF document text
    • https://cdn.sqhk.co/pisupuwov/9oWgfia/al_kahraba_electricity_bill.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_600a0e4a771c3.pdfIn PDF document text
    • https://cdn.sqhk.co/xekobigi/bYigCgh/blockchain_platform_meaning.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/e8be0d36-db99-4ba6-8bdf-4a08fa2406b2/sosozeruliporatimex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5934bdb-f41b-4d55-a294-f71c5d1fb268/casio_fx-9750gii_programs_games.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/zobijevonomadibanag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ea6fb3-1e23-4893-90fa-8f6402aa0df8/brookstone_earphones_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/nhtsa_manual_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/61578469699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90245df-787e-4c58-aae4-8e88c2ba0581/dell_optiplex_780_power_supply_problem.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_off0000cdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF4 5576 bytes
SHA-256: 5367675ce91998da62b4aed3031be755189dfbb5f4ef05d2b79c664db59b7a23
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 9912 bytes
SHA-256: 4fe26e88de7970e5a324d1a7a3fd210f17b89b0136f3bf3431f7f3c444a4b038