Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f88b9684f2b889…

MALICIOUS

PDF

80.1 KB Created: 2021-03-10 09:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2d20671c35315774900da2549d4a410f SHA-1: 17a20ef772aaec1427bf5599e11970ac08be75d5 SHA-256: 17f88b9684f2b889c2c9ce60933cd08603c51344930c5538213fe01d2cf3e930
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to potentially malicious sites. The 'Remote-support tool lure' heuristic indicates the document likely instructs the user to install or connect to a remote support tool, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://seumenha.ru/strik?utm_term=is+mac+better+for+design PDF link annotation
    • https://cdn.sqhk.co/tupipitijil/xDxiehi/sdgs_in_your_pockets.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/how_to_rhythm_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/IMMKhaF/governor_of_poker_2_premium_edition_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/xrgfhcV/lanidokovopunadifefev.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/what_is_the_order_of_the_books_of_the_bible_chronologically.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/fajezebomotu_vedexusotebave_jidezudev.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/jhgde5v/logo_republique_francaise_vectoriel.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/d0c506075.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/bevij.pdfIn PDF document text
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/6162923.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/c177d59ae0fc.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/94273354323.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/why_are_my_gears_not_shifting_properly.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/tikefom.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/ad8517b7-0c88-4707-a36c-b60310e6b692/common_core_state_standards_ela_grade_2.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_ff14d3129e69450bbbd74d0170d1baa4.pdf?index=trueIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_de6bc52651d54084b232d479fa60009c.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/sosujulemijonodeninixuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6ae328-0ff1-4c3b-b7d6-269bbe8a4a3c/gogavol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0cb8c7-6a6e-46ec-aac2-e4438eefb3a4/how_to_charge_jackery.pdfIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_3bf29a2cc0964eac88e90af399d68947.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_95d270e5e0ac4d9a8e0acf2782775e5a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84de0514-e19b-4764-9fc8-effc78a54d88/xamiluvozujamomelojiko.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_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 5384 bytes
SHA-256: f9a76510b93c99af9e7d4e8dc159b335f51709e7a8c678aaa4cec1394ba9380d
font_01_sfnt_off00010e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E13 10908 bytes
SHA-256: 7a5b8ba4d2cc3c646c579f4d57117e40ae72ae0dce944b868d5b407328ebe84d