Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d583386b3655cf7…

MALICIOUS

PDF

87.4 KB Created: 2021-04-19 23:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 686126c382f08c4d5ae68008e55a7d35 SHA-1: 2b9c5c3c43ee0ce8f52df39defd4cd8b2be7027a SHA-256: 3d583386b3655cf7054780f044185885726e60dbddf524a38c2d08f63a01dee9
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 0.9997

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=can%2527t+find+my+cloud+home+on+network PDF link annotation
    • http://a1metromovers.com/zatomusenumijalap2e505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_6058bd2433f32.pdfIn PDF document text
    • http://phtech.site/56700185542ixguz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5ff86a257322e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_605701e5cede1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367687/normal_5fc86be24ec79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_6048a28ca039c.pdfIn PDF document text
    • http://konolux.medianewsonline.com/693889289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_600157bf397c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fcab418d828b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nononulavojiki.myartsonline.com/38343518807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a9ceb2-270d-4e14-a719-78b588d4673a/power_air_fryer_elite_5.5_qt_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0918e436-348f-4759-b566-0e2f0b718a3b/12585273548.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/9069937416.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/bobilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1f686d-dc11-4982-b1bf-1f1bb7110188/23222634058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8c1454-4ba8-41fb-aca5-709ed0edc000/craftsman_self_propelled_lawn_mower_parts_model_917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e141a9-bcfc-4421-acf1-40a4712e9556/grundfos_mq3-45_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab216538-5b81-4175-b0d9-bc942822314f/do_taxes_vary_from_state_to_state.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cd468a-55fd-43f8-b12e-7f163a442ff0/fadibujopadaparomagesa.pdfIn PDF document text
    • http://tudugir.atwebpages.com/51426393765.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_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 5280 bytes
SHA-256: 25c4cbd2e32c1b1baf5086cd3ab4060b8d1445974ba350d51ee0ab94083a005b
font_01_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 11184 bytes
SHA-256: 12a2b0a2a78a0f5314a7512253943c5cada3fce4bc9a2a662cb03fa8324c0eac

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