Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70f433312760452…

MALICIOUS

PDF

78.4 KB Created: 2021-03-12 12:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9664be22b2c57cc6de83def5d1f0811b SHA-1: 9feef21dca9033a00a7cc842652221a5e2146dfc SHA-256: f70f43331276045283c0df60f01d6f0372672b2008d09f1760fff45026c35e87
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://fokemale.ru/award?keyword=fundamentals+of+radiation+chemistry+pdf PDF link annotation
    • http://big-ita.space/modal_verbs_definition_in_urdur13w1.pdfIn PDF document text
    • http://tricitysikhs.com/zodaborettpp9.pdfIn PDF document text
    • http://pitushok.fun/polyhedron_worksheets_for_grade_5lygof.pdfIn PDF document text
    • http://effektzhizni.ru/microsoft_xbox_one_lunar_white_wireless_controller_only_at_gamestopgm4bc.pdfIn PDF document text
    • http://pearhaidhr.fun/74607692415pv9mg.pdfIn PDF document text
    • http://magnetfix.store/lesisetowifezihfjwk.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/chevrolet_impala_2017_manualyofwr.pdfIn PDF document text
    • http://bestgirl69.com/634249331508aakb.pdfIn PDF document text
    • http://ampinternational.org/murojemejur9b0wh.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/e2d5936d-70c6-4771-aaf1-54da2e114e41/ludemob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf31d806-625f-4f6c-8dc6-94bb9979fc8a/10974752129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9269e4e-29fe-4a0e-9b73-988eb3d9e10d/what_does_it_mean_to_be_fair_minded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e0f880-195a-4e3b-a362-5fd11faa683d/wegozojeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a561ac-25c2-40ec-ab45-7cdf91be2aa6/elements_of_art_and_design_texture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04b0181-e029-47aa-88e3-9464b2aa1ead/garmin_920xt_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/36634029362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79135cb-b12e-442d-8e5c-1877c00c15c1/bominetil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9b7049-371f-4671-bb94-3a180433ad95/24649867642.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/6710376100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedbbc85-38b3-4ebb-a447-e8f3fc0bce57/mental_health_assessment_tools_for_depression.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 7

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_off0000f55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55E 5452 bytes
SHA-256: fc87590638f41399caf23b1e4122991244c661a45905d783d387f268ba2d164f
font_01_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 10924 bytes
SHA-256: 65319430834e2f2bac15bc475278547d692b6bdc60f1c26060911353cd105b4e

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