Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1eda725b569a43…

MALICIOUS

PDF

90.3 KB Created: 2021-03-16 20:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b289680d3008ebe1b6327aaab71c5f20 SHA-1: 10d1521a6cb09ebd776b6d95f4c67c9e4c1c5c7e SHA-256: 9a1eda725b569a43c8ae9f440802055dde884b9380a78d076235ff8dfe0fe073
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the document's structure and numerous external URIs are indicative of a malicious 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://soxebez.ru/123?utm_term=elegant+dinner+party+menu+template+free PDF link annotation
    • https://cdn.sqhk.co/xuxosoler/13if8BQ/learn_english_conversation_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/omMifnO/toliwovetixunogefivor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5ffbdaf128ac2.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/fz5gOgg/voice_coach_reacts_to_disturbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_601c7b6e21aa5.pdfIn PDF document text
    • https://cdn.sqhk.co/jutepoxof/TgjIqib/dumuviz.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/hg89igz/flat_value_proposition_canvas_powerpoint_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/ha6ghUh/baby_shark_lyrics.pdfIn PDF document text
    • http://zewamiluwevegif.22web.org/memobalixerenag.pdfIn PDF document text
    • http://maroron.22web.org/graphing_inequalities_gcse_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486365/normal_600628c3e88f7.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/remavuj/pretty_little_liars_book_4.pdfIn PDF document text
    • http://tuxusar.epizy.com/baarish_yaariyan_song_free.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_9e2cb6a161234726aeea0a982018e7d8.pdf?index=trueIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_8c1182e9b4584f4cb71f12755a9d11e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piradi/tamil_news_hunt_software_free.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_7400b019e49844aa9230a5fc88d66d98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/medidas_block_de_concreto.pdfIn PDF document text
    • http://fixujutupuwi.epizy.com/vomirap.pdfIn PDF document text
    • http://zezazemana.epizy.com/sewezalojisin.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_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 5240 bytes
SHA-256: 0c70967078b99cb03e6d4c299230ebf75e9f4856c9ff4dae88d2cb82c10af653
font_01_sfnt_off00013643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 11116 bytes
SHA-256: b1a4513975d56ad9375ba8c9fe13d5917d13398553fc4bf1ea3c2d2044ca2804

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