Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a190a05033ea9ea…

MALICIOUS

PDF

88.3 KB Created: 2021-03-21 09:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 96ab291e5adce08ce1640670269ed3bd SHA-1: 00ec60e44b7bf462060d11f00a6ae28195cf548c SHA-256: 0a190a05033ea9ea6d8be427a9938683e4dd0ab5f550717cffea54aeade83e83
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious content embedded within or linked from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=anthropology+books+for+upsc+pdf+download PDF link annotation
    • https://cdn.sqhk.co/lorotukogof/jhhfijm/help_the_guy_subway_fun_run_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_60121d5cec2b9.pdfIn PDF document text
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/penexerafonetozuwe.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/b8033870fe.pdfIn PDF document text
    • https://nilidufudomalo.weebly.com/uploads/1/3/2/7/132740748/sotilugodemimid_lewelu.pdfIn PDF document text
    • https://rafinavogeseb.weebly.com/uploads/1/3/5/9/135987446/mubuvuduxukala_falutidirer.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/d68e298.pdfIn PDF document text
    • https://merokiniperoj.weebly.com/uploads/1/3/4/6/134691049/3839e3476cae5.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/g8jeHbi/16748792329.pdfIn PDF document text
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/7f7ba9bffc.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/sisufusaruv.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxigu/tTgihh9/50214497439.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/6899343.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/48eb902782d36ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_600c4f2b1f204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevamixebigal.epizy.com/eviction_notice_ohio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/mopemizajilifexawi.pdfIn PDF document text
    • http://gefegasoro.epizy.com/beat_pe_booty_full_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/telephonic_interview_conversation_sample.pdfIn PDF document text
    • http://xufivutuxalug.rf.gd/solamudaxexoribugaj.pdfIn PDF document text
    • http://zukevajisuw.rf.gd/m-audio_firewire_410_driver_mac_catalina.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_off000119ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119ED 5804 bytes
SHA-256: 53ffa691624740d2ab336645d0f7be1bb87eac4d89dda50d2ba0fd225cc819d3
font_01_sfnt_off00012dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC6 11192 bytes
SHA-256: c522a42b302e3bbfcb711a2696ccc5773fcc46d7e1c62c7556ebc3abe76bf211

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