Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8f7f65c6750c8e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-27 21:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf5eaf3077711aef5aaddb0bf66f2e45 SHA-1: d9d645ce1ea9cd65987bf5800b9d14be556390d3 SHA-256: 8f8f7f65c6750c8e9612371a90d2150f7b7bb381b7a0be65f544081303fb510b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/strik?utm_term=comparative+financial+statement+analysis+project+report+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fdc8436cddaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_604ba9054cba3.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gf8FLhg/j2me_loader_apk_download_uptodown.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/life_and_teaching_of_the_masters_of_the_far_east_reddit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466151/normal_5fdad4e6b6126.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/do_ge_dryers_have_a_reset_button.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_6051cd46a1dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446784/normal_6006e3365d441.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/ifYEnha/golf_gps_for_wear_os.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/openfoam_boundary_conditions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gudugapapilile.atwebpages.com/38634909050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1656537b-cd5c-43e0-a7b4-4f3afbc71bf4/58721695566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d445ee6-91fd-48be-90d8-0ee02917f592/animal_farm_chapter_2_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55050909-678e-48b7-a6c6-f07270e68c62/delta_scroll_saw_40-560_blades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac83c7a-b976-44fb-866b-c3401d44a6c8/93720042497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e6a20c-5f8a-445c-8068-da52d4be2012/lazusiwuruvekusozival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e82b1e3-629c-4f35-9ff6-e6e86dbdc15b/hegelian_dialectic_prodigy_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0423f25-2fd4-496e-89bd-a9e7afff40d7/nunulonugofemefekapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8105e708-6f04-48eb-9ec5-5dbabd1b3497/gukejapa.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_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 5444 bytes
SHA-256: 2de1a848e02ec844f24557f98cfcfb056b9a50a2ea3718a5c1004eb69d9dbc11
font_01_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 10460 bytes
SHA-256: d083a3e32409d8a1f462114339313c2a39a5c94d2739733d5b9e853e6774a150

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