Malicious PDF — malware analysis report

Static analysis result for SHA-256 9443e98d23aaae36…

MALICIOUS

PDF

73.1 KB Created: 2021-03-11 19:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba2f757c5e5feb2df65bb9fd6145d3d SHA-1: 9bc8f8ddbe0c26d6cf7f6fcb68b254b253f2bcfb SHA-256: 9443e98d23aaae36ae0061deb061283ac6fcd730cb5aed6790fb6c48755d84ef
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the sheer volume of links points to a lure-based attack.

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://zajinet.ru/wix?keyword=10+point+pitch+online
    • http://siwivelijutore.medianewsonline.com/what_are_the_goals_of_health_psychology.pdf
    • http://velesvoyage.ru/birthday_pics_for_boyfriendsz3z4.pdf
    • http://fuvagezilavez.mygamesonline.org/panasonic_dvd-s700ep-k_dvd_lejtsz.pdf
    • http://xifasiv.getenjoyment.net/66188700557.pdf
    • http://daddytestit.xyz/the_collector_hollow_knight_lore8vljg.pdf
    • http://wejuveziwep.mypressonline.com/business_partnership_agreement_roles_and_responsibilities.pdf
    • http://posurazatux.mypressonline.com/gene_keys_and_human_design.pdf
    • http://seweripuwas.mywebcommunity.org/12a_cartridge_refilling.pdf
    • http://trujillostacoshop.com/linking_words_english-arabicw36s7.pdf
    • http://nanamojuvimujo.medianewsonline.com/multiplying_decimals_video.pdf
    • http://fesotisifofil.mygamesonline.org/2000_ford_ranger_steering_wheel_cover.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_37bbb35baf9540b08a30d9da1affa390.pdf?index=true
    • http://juvusowupu.onlinewebshop.net/70322764693.pdf
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_91ebe50a24be4078aa4ab5725344538f.pdf?index=true
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_f3ccbb72b6a7423b81767546eeb3d5bd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/20985b9c-8c71-408f-953f-b8a2f67fc372/is_khan_academy_sat_accurate.pdf
    • http://xologikaju.atwebpages.com/losazulidiwelemum.pdf
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_6c88e76de63c45f2ad43aeb7297db83a.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_edeeabd30a7647a0a6a53479bee11d77.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f9abe69-3ca2-4697-adaa-1abf1ddda749/what_is_family_per_capita_income.pdf
    • http://jisijuvod.myartsonline.com/the_maze_runner_2014_full_movie_download_in_tamil_dubbed.pdf
    • http://tobikinos.onlinewebshop.net/24256601464.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e508.bin
73e0c255dd4da06f970bf02d3eec7091a2cbd77176fffc82583e7cdf10d1682b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 4636 bytes
font_01_sfnt_off0000f4d7.bin
2f5794b9a614b6197f4553ed3bc650c652d03f920bf4d829b0dc8addc61f1621		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 10080 bytes

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