Malicious PDF — malware analysis report

Static analysis result for SHA-256 828e04d24974b74f…

MALICIOUS

PDF

82.0 KB Created: 2021-03-14 01:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ed08f930ff4c525e3e32a4d1149afe85 SHA-1: b7aed8ceaeb35eb30ff4a9dc7d7b00d6c1d00e55 SHA-256: 828e04d24974b74f470bc2b7169b3c620b1ae4d2567380a4f3ecd45050eacd3e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, 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 redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/award?keyword=understanding+public+policy+theories+and+issues+pdf PDF link annotation
    • http://salea.site/vabinukr99de.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/gd1Mge1/gegopogavilufepeladozu.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/83615124357.pdfIn PDF document text
    • http://vivadoctor.ru/hunchback_of_notre_dame_broadway_musical_cast482u0.pdfIn PDF document text
    • http://rubisteq.online/image_editor_android_github7otvz.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/thbhh22/49211997592.pdfIn PDF document text
    • http://tvoy-ogorod.online/somaratukokuganouw30u.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/gevapow.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/1MVjdia/rome_total_war_2_legion_units_lose_experience.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/BifHhbz/16324542411.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/95214004709.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/7332370524.pdfIn PDF document text
    • http://lunesygets.xyz/91057481549myzp4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dibedamoka/82868973536.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/nonuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/2005_chevy_silverado_2500hd_instrument_cluster_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d447a0-93bb-4b72-9ed4-50a203036bf0/lojilizomegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7496d8-3437-4793-a8ab-ef1663c220de/38264153020.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/71403533499.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/53567042777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9a0328-1329-4a63-a722-c7fa6f0e83f5/the_ravenous_pig_restaurant_orlando.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483db250-120a-4855-b65c-9a88ca8f9c5d/pudaf.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/the_luck_uglies_book_series.pdfIn PDF document text
    • http://dopovis.myartsonline.com/wozaxato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d45eff5-b529-4e64-ae62-72c0d301b896/is_swiffer_wet_jet_ok_for_hardwood_floors.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/63371209167.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 5532 bytes
SHA-256: b70ad4c0c2adfe8b8d82bc404983f24d2c7d42857c3408017aaef073ed689326
font_01_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 10560 bytes
SHA-256: 8e8a4504309ed62ae633ae56108169c8f7af44309c252ac454d8e13e6868fc24
font_02_sfnt_off00012b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B51 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34