Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cbac50d520ffbd…

MALICIOUS

PDF

68.0 KB Created: 2021-03-24 14:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0b73abbb408c1fc6c7479e2f3579458e SHA-1: 49f9f3719e0870417aa92c93c10d04ba47e688a6 SHA-256: 94cbac50d520ffbd83a953537cd620640375ed377891d5272b4e2eaf1f9fb0fc
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=troy+bilt+super+bronco+belt+size PDF link annotation
    • http://biomaniix.website/didevokudezurudyisb.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/fEZibgd/imperialism_study_guide_key.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/dnuiehh/let_s_go_texas_longhorns.pdfIn PDF document text
    • http://chunyoo.com/wososufogvrnc.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/hiBOhir/warhammer_quest_card_game_expansion.pdfIn PDF document text
    • https://pabalosuto.weebly.com/uploads/1/3/0/8/130813917/3942822.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/wazexinalinekututux.pdfIn PDF document text
    • http://optamorem.com/613713385562b2eh.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/zomusenilukanokolajo.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/heDmeje/69116442458.pdfIn PDF document text
    • https://mapevitesofik.weebly.com/uploads/1/3/1/6/131606073/bakifugoxo.pdfIn PDF document text
    • http://craftsmansmetics.com/phenol_formaldehyde_resin_organic_chemistrys8aw5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/66439130157.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_33120e77471c4f4eb06c5c70a10060c1.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/sowetuwulopusobeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e3b9f0-2c9c-4f3b-88e3-13bd4a914ea8/25660447503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9134d7c-e78b-47fa-a6e3-befdabad797a/suzuki_125cc_dirt_bike_2_stroke.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_6024aaf4850e4476a19d5e36b06b7bed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0358ad1-478d-4e97-b6c5-725622aed199/why_is_command_r_not_working.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/canon_pixma_ip110_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc73ff9-0ebe-44b8-b502-521ead13af51/64045091675.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_off0000cdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD9 4960 bytes
SHA-256: 9440f4e3fef39002de7c415f63971c2ecabebbef2616455243ae50b3a4c530e1
font_01_sfnt_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 10488 bytes
SHA-256: 51d02cec848f6999cfc3bb444b6f471a2e6cc4a88ffa89c9734198ecf3ddee9e

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