Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d0e055ab76a786…

MALICIOUS

PDF

76.2 KB Created: 2021-03-06 18:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d4b8f4012b91d3e1ebb0e9d085d0ec4 SHA-1: f31dd3c108bb2f5ec74e29c1243e2a17b306efbf SHA-256: 21d0e055ab76a786a21aafbc28933b972bbc5acb95743d6b5e3e8849f9ad803f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting and is flagged as malicious by ML classifiers and ClamAV. The document body and embedded URLs suggest a lure related to a game hack, directing users to potentially malicious domains like jumiwimov.ru. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=papa%2527s+donuteria+hacked+apk PDF link annotation
    • https://cdn.sqhk.co/mitukutowum/Tiaumia/51863402322.pdfIn PDF document text
    • http://g2am2e.xyz/badol53yfu.pdfIn PDF document text
    • http://gdztut.com/fundamentals_of_plant_virologymzw1b.pdfIn PDF document text
    • https://cdn.sqhk.co/dogovonediwa/hdjjEQ7/zutaxelabazosanuwenagewi.pdfIn PDF document text
    • http://x-bionic.shop/poke_genie_overlay_not_workingpcmv8.pdfIn PDF document text
    • http://stopro.store/molosmbgbi.pdfIn PDF document text
    • http://babysampler.com/tia_569_dsaa6b.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/oNgehff/real_driving_ultimate_car_simulator_hack.pdfIn PDF document text
    • http://gayerkan.com/52846046068kaxaq.pdfIn PDF document text
    • http://usesol.xyz/kovuteghcm9g.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/50010285-e748-4881-8032-729000271823/why_is_direct_instruction_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3056a02a-bff5-4753-a337-e60af46b8ed1/nezid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75322c90-d892-4baa-88ba-9a744ad541c5/sowusesode.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/39068626782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f71557b-1309-4e32-8420-784e4fabe64d/36179581143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bb0d7c-d748-42b9-98ac-bda29fcb1e35/torevuboxuluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2ed0dd-a2a7-48de-82db-543b17eef9eb/litudivenarisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0434882-486f-4d43-a34a-156a8d1a6ba8/cuanto_cuesta_el_metro_cuadrado_de_terreno_en_jilotepec_estado_de_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/besame_mucho_guitar_sheet_music.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 5228 bytes
SHA-256: 995529ede153d09bb4b4fcaa3c850fa0070e1f5bf9f198497145e52b78a6b3d3
font_01_sfnt_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 12680 bytes
SHA-256: 8a43ecde93cf14f698336dc36c55b71f443f70563b08bce82750228d66082b7e

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