Malicious PDF — malware analysis report

Static analysis result for SHA-256 540899682b30e5d7…

MALICIOUS

PDF

67.5 KB Created: 2021-03-24 15:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f182bcdb69357bb14eb7d1667a10c382 SHA-1: 5e1eece46f8ca60cdeb408f9f9c7d55d2a079108 SHA-256: 540899682b30e5d737736cb81c294b2a571d91182eb01d477315269ffb7e555b
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 0.9996

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://mezovuduw.ru/strik?utm_term=imperfect+tense+practice+worksheet+french PDF link annotation
    • https://cdn.sqhk.co/sozodumupof/hggbxic/wanuzonaboripen.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/63260566889.pdfIn PDF document text
    • https://cdn.sqhk.co/mesojofu/6iaStxC/49698380897.pdfIn PDF document text
    • http://pc-remont.website/69367156662d1gtc.pdfIn PDF document text
    • http://fifonugimexa.22web.org/kawudejapetufobaze.pdfIn PDF document text
    • http://fastnoutservice.ru/what_kind_of_oil_do_you_use_for_cradle_cappi4s3.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/WYR5jgk/real_steel_2_trailer_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/uM9QVjg/jivarugivepizukob.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/dewalt_734_instruction_manual.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/bcf6e5ef-8bc2-453f-8289-fc0d5ef07ad2/undoing_project_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/436f4960-dae0-4f7a-a168-2e74bee5f08a/best_fishing_lures_for_bass_in_summer.pdfIn PDF document text
    • http://lotawom.rf.gd/35935853388.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/agatha_christies_poirot_season_9_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c964863d-1598-4247-bfa7-40e6a9d672d7/what_is_the_role_of_mandated_reporter.pdfIn PDF document text
    • http://bobupugarini.epizy.com/myriad_pro_boldit_font_free.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/pepivuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4d5153-2389-459b-8e9b-e4ea0a0d004d/asus_p8z77-v_lx_update_bios.pdfIn PDF document text
    • http://xakilapug.epizy.com/32421376233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3eded6c-9595-465f-b3bd-91326ca37112/iris_blue_light_software_reviews.pdfIn PDF document text
    • http://butadiviwev.rf.gd/beluweropudexelumifed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4afbb379-8729-4eb9-8d2d-01f42af04e12/62898574089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f24776-b85f-4a79-9bb2-41c4acc54eb9/how_often_should_you_change_dsg_gearbox_oil.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 8

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_off0000cb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB29 5316 bytes
SHA-256: 6bc8919ce884684aaf3296c47318b749b2ac41546c534243db36f0d153ec7ec1
font_01_sfnt_off0000dd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 9824 bytes
SHA-256: 83f33d493d9e2560e50c083fb3d41bde8005bc745447e5e2805e53fcf593a65f

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