Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec220b53e0663a96…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 14:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b46420556b44e11a71308d1d55c89047 SHA-1: ae805932eb46e99c0d91e46e7900b91566b755e6 SHA-256: ec220b53e0663a962e97ddf462c9576cda0615f8eaa87492dc1a2775c75136fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

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://maypoin.ru/wix?keyword=low+incidence+disabilities+definition PDF link annotation
    • http://joriwolujuf.sportsontheweb.net/basic_life_support_2020_aha.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/major_themes_of_duchess_of_malfi.pdfIn PDF document text
    • http://mebotus.mypressonline.com/lavakosobawinefuvowosuluw.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/iaIeieL/download_game_talking_ginger_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/heQwijR/love_and_artistry_makeup.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/ig9bCUC/zombie_scrapper_switch_review.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/8121544.pdfIn PDF document text
    • https://mejojesakawevud.weebly.com/uploads/1/3/1/4/131438193/folemujizij.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/penebijevizak.pdfIn PDF document text
    • http://xasekijig.mypressonline.com/pufovewexiwavarilidazev.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/gehcOgf/lokur.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/jirugope.pdfIn PDF document text
    • https://puzapageduz.weebly.com/uploads/1/3/1/4/131453954/lirelefebituzuf.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.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/8e0da939-ae74-46ee-9093-2aa1f1bba002/tuesdays_with_morrie_audiobook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/how_to_provide_safety_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/21316215209.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/zukep.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/5823918204.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/mcafee_antivirus_android_review.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/porter_cable_nail_gun_repair.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/xibadotapiviradujotasur.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/tabafajanabazagexemigawam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c890f56e-b887-45d4-938b-0cf64f0bfc72/jolijugoragobuxivesar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11d4b1c-dedf-4fa6-ac8d-45bd5608edc8/samsung_s5_active_launch_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c592a-ad18-4a99-94de-6eba0f131a52/samsung_remote_bn59-0131a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97e53a8-8889-4965-b95d-9a660cfac8b6/indian_plant_based_diet_for_weight_loss.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_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 5092 bytes
SHA-256: 922e9b69b6993348a323f55e53c40cc0b4314f43601b4ae27f6aac73540ed8b1
font_01_sfnt_off00010d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8A 10668 bytes
SHA-256: 80106d3e1b90d74fcb79947dee1e19e2b67491daeb5f0a35924fc9c26458cb95