Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a54121cde20009…

MALICIOUS

PDF

78.0 KB Created: 2021-04-27 15:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 342f0e3905f84bb676d390539ddd333e SHA-1: a94593abfb18d8c19ea2b88f4b757b965ac2bcc3 SHA-256: 90a54121cde20009191691dd235d2f94e9701c324d53b0ed70cb95a149412cc1
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 0.9995

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://vilenefex.ru/strik?utm_term=how+to+test+actuator PDF link annotation
    • https://cdn.sqhk.co/zupuguvawaj/djiiilQ/us_stickman_army_rope_hero_gangster_crimes.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/37617898118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6059f73942114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405950/normal_5fe48d3855ea3.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/2Fhjnjc/45134218540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_6018a669ca80b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5fc99df3225e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480387/normal_600aa5ead1060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_099bf8e5e7344f03968fd5dca7fab6c9.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_ef0caab16ac648de9ae00746611d6365.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/sikusegusizalabewopugim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52ba4eb-41a5-42ac-bd54-7f1453181f12/67433953789.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_17347c58d6114da695b4825a6ca0941a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e0ec96-f49a-49f2-b993-0e3a53a5cf0e/eclipse_mp3_fit_clip.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/company_logo_design_near_me.pdfIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_ecd9f8165d1a420993c94ec553be85fb.pdf?index=trueIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_57c00c7b3d0b436a9b557c4f8e80c1b7.pdf?index=trueIn PDF document text
    • http://xiwozoget.atwebpages.com/ditofojafajuteludapixudoj.pdfIn PDF document text
    • http://limufij.myartsonline.com/baricco_castelli_di_rabbia.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/xeretuzofatojaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a4fc56-106c-4736-a9c4-2193b299abd6/31442975507.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.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_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 4812 bytes
SHA-256: 5db5f548fa4b4434a0518ffe6cbce1f61d26c8bd67cdf92058b0ff4aa063db9c
font_01_sfnt_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 10548 bytes
SHA-256: 8836aac339a507799276ddf6475c91921f028d112e5b66034012404c9693a99e

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