Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c046e792f057f5…

MALICIOUS

PDF

87.2 KB Created: 2021-03-17 19:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cecfe901d2070e203b6a2423cf856995 SHA-1: 1b78692024c68453d8f2660bc91cac4993fe1339 SHA-256: 86c046e792f057f5f37dccc731f465a3c93164590be8ac9b7b753623b372aecb
186 Risk Score

Malware Insights

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

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 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://golowaki.ru/strik?utm_term=strongest+rope+loop+knot PDF link annotation
    • http://j3vnci4.xyz/cancionero_guitarra_rock6rvn1.pdfIn PDF document text
    • http://hdsamara.ru/tabekozapowejokuspoi88.pdfIn PDF document text
    • http://hihikane.space/ziroviwiwabipimufebumatjmmy.pdfIn PDF document text
    • http://ogranifruit.space/tom_eshelman_scouting_report2vgjm.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/59463744059.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/where_is_samsung_a51_manufactured.pdfIn PDF document text
    • http://sfr-webmail.com/how_to_build_a_kindling_splittery4nsl.pdfIn PDF document text
    • http://docita.fun/6454271866316nyo.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/maths_book_for_class_8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_9519df36080a4d19846465422ad105de.pdf?index=trueIn PDF document text
    • https://c92c3cbd-aa1a-4a47-9f3e-f582eeca1925.filesusr.com/ugd/89b1bc_7573914a1085476eaef3017c3354fd88.pdf?index=trueIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_b5e8c8fb92de46bebf9a7ab7f729a8d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/accident_report_springfield_oregon.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_0b3c9c8ee382422b8ec3e36d7ebd7dd6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/hunger_games_first_book.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_4b0681be58b34f6c8728aaadb1e123cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/41577573186.pdfIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_1db682d48b8d4748b13132604055368e.pdf?index=trueIn 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 5

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_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 4944 bytes
SHA-256: 0da3f32033044812664d41cf075aa4d4d14176e5ba0781d3656c45431021b337
font_01_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 10936 bytes
SHA-256: e6ff1aa5fe9b1a2bd716ac8dfff828b4ee6b9138bbea8a60c74fb9f147910ced

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