Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3a0bebcc823f0e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-26 01:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 62bd700c07cca1337ff32cdc2d7a7f5d SHA-1: c0c8f4dd80d1ca73e44fa3ab215a2a666659ca5c SHA-256: 7f3a0bebcc823f0e0eb073742f3f1fa8c125c93af0f68ff662a336a0b7a34106
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a pattern of distributing links across various low-reputation domains.

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://baarspo.ru/123?utm_term=src+bede+sixth+form+sports+centre PDF link annotation
    • http://vuluson.22web.org/81746328500.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/96018987317.pdfIn PDF document text
    • http://jevosetixa.iblogger.org/mefenab.pdfIn PDF document text
    • http://penoligis.22web.org/oxford_dictionary_file.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwapipu/ieyBiYV/folexupogo.pdfIn PDF document text
    • http://bajelow.iblogger.org/effective_written_communication_skills.pdfIn PDF document text
    • http://dutipajito.22web.org/create_action_sheet_swift.pdfIn PDF document text
    • http://xuxizud.22web.org/literary_criticism_online_course.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/Yiaha2H/66962747164.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/gixamego.pdfIn PDF document text
    • http://zonidapobup.22web.org/filisili.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/jgggchh/puvodiros.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larifobuxol.epizy.com/nizet.pdfIn PDF document text
    • http://gesutebixip.epizy.com/36099460605.pdfIn PDF document text
    • http://zasaraba.epizy.com/everything_is_awesome_piano_sheet_music_free.pdfIn PDF document text
    • https://83d20924-b0b8-431b-b059-41ab5e49e88c.filesusr.com/ugd/99b222_f19e004a55314fafa9e798f754388d3e.pdf?index=trueIn PDF document text
    • http://robowogutalopet.epizy.com/tegibuwexefuzabadilusa.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/i_am_not_perfect_but_i_am_limited_edition_meaning_in_urdu.pdfIn PDF document text
    • http://zibuxaladovokex.epizy.com/fepaloboki.pdfIn PDF document text
    • http://nadoxomamepaf.epizy.com/grammar_activities_for_high_school.pdfIn PDF document text
    • http://fudixuxutinizow.rf.gd/yowhatsapp_apk_7._99.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_5ca52caee2fc4c8ca4c35ff1e3ec8f2c.pdf?index=trueIn 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_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 5464 bytes
SHA-256: 141551ce2aa61c87e66895f2949feefcc1519e18d00a02029e70e4812f2fbcab
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 11884 bytes
SHA-256: c3103f8d96dbb7281b24de1e5cad96ab969a84297fd7da333b2117034df617b4

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