Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd6b03d71ac20a7…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 07:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1399f4e07f0b393d9b582cc675ff0d62 SHA-1: cf60f3bff074454b1ad7aea141b8f7e2a714ba0b SHA-256: 7fd6b03d71ac20a797546b6e5780833d223cd03416729273ad7fa56c6fd786c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous external URIs, with one pointing to a disposable hosting domain, suggesting a link farm or redirection mechanism. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://druttle.ru/123?utm_term=north+america+biome+map+coloring+worksheet PDF link annotation
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/ccffc7ec.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/i5ha5ra/among_us_play_online_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/iieHHkA/2020_american_crossword_puzzle_tournament.pdfIn PDF document text
    • http://prizinsta365.website/fonuwekabejokoj4b.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/jbiegg6/siroko_k3s_sunglasses_review.pdfIn PDF document text
    • http://hookup755.fun/confidential_report_form_gazetted_officers_kerala1km79.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/37432348475.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/29043299112.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/cmjeFb7/airplane_mode_cast_movie.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/populiram.pdfIn PDF document text
    • http://gelchlen.fun/liwepiji34d80.pdfIn PDF document text
    • https://xinegipifi.weebly.com/uploads/1/3/4/4/134404318/abc604c.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/54049806987.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/fMwhcWh/blade_irons_2020.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/vatus.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/joratufara.pdfIn PDF document text
    • http://ketotreno.buzz/88237645351ywvex.pdfIn PDF document text
    • http://disozire.mygamesonline.org/15924379167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/major_themes_in_war_and_peace.pdfIn PDF document text
    • http://mojigoka.atwebpages.com/ginepaliwudinifapunosex.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/limopovigadusow.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/59700481784.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/4880863424.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/tequila_percussion_ensemble.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/akcent_video_songs_hd_free.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/kefinaw.pdfIn PDF document text
    • http://wififeju.atwebpages.com/nivezilazebirumofonodonaf.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_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 5612 bytes
SHA-256: bed002f650473eb428fdb0eb810367a00a623152b97c4d45fce10292a8b7df13
font_01_sfnt_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 10540 bytes
SHA-256: 4b4f34b1816a73e93133827c0756243771e5faf5591adb5c655484a4f2964843

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