Malicious PDF — malware analysis report

Static analysis result for SHA-256 d992bed2b9b07b61…

MALICIOUS

PDF

77.9 KB Created: 2021-03-06 11:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c0c00c5b72a3f4083ef737a24f14de1 SHA-1: 5a7c41b728ae31251853aa029dfff82fbc5fd451 SHA-256: d992bed2b9b07b61e59f16887324ac273836fb08168310744ba7fb0a37438c63
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-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://midufefew.ru/123?utm_term=is+it+safe+to+exercise+with+scoliosis PDF link annotation
    • http://segaruzobuguses.scienceontheweb.net/after_book_3.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/53460535322.pdfIn PDF document text
    • http://menbp.online/bhai_movie_sunil_shettyls6pb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_603e5ee99fb1a.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_is_the_calorie_deficit_needed_to_lose_weight.pdfIn PDF document text
    • http://jakor.pro/mupijuzagolesadigorik3t1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_601247e612aad.pdfIn PDF document text
    • http://clubstore.pro/kajenaxavutegabpb7m1.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/fiakzyW/riders_on_the_storm_the_doors_lyrics_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_600f98e04caac.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/eicphaK/resistance_to_extinction_psychology_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/fejukomus/FlggJjh/publix_italian_wedding_cake_recipe.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/1dbec188-2a59-4ca5-b8f1-a2e00d771fbb/english_talking_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da048971-4b04-4812-9643-c1b4b089aeee/perikopamureza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f69aa59-e7fa-4f17-8b32-57a3c8d8c478/54467210302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6329199-6da4-42cd-96a1-86b0d402a953/remixekewunopeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f16ac03-b9cf-44de-b032-7696b1331f46/bovorumevajufowuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf2ccce-4aa1-492b-81d8-84a146c3fe14/78305559517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f149f41-ef11-4939-890c-491643fd380e/18217513992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bf500f-11ad-4e8a-9f3a-a4b4ea066b19/91881330289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6661388-bd10-4238-893a-ff4b06eec5a1/70866802854.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_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 5064 bytes
SHA-256: 91d21fd95569bf459b379af37f46f6c23ad41162f7cd4c0bc6ab509ed8808d7f
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 11000 bytes
SHA-256: 0d375f5901e1355bc2bca091588eed6bf8c69d20add3bd38d9e63954b3d70fc7

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