Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f002ceb2be64244…

MALICIOUS

PDF

78.8 KB Created: 2021-03-14 04:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f64351d10d274ba6ebde92bdf8c730fa SHA-1: 976da66b2b513ef083842827940166fd1468ba69 SHA-256: 3f002ceb2be64244ae9c2bfaaf2a9504d9cbe3916f7207a80997ce0c92f73f2c
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this finding. The embedded URL, https://bologen.ru/wix?keyword=reflexive+verbs+spanish+worksheet+answers, is the primary indicator of compromise, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=reflexive+verbs+spanish+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5fcbd1d2b83b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fdd46cf5171d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493579/normal_5fdf887e7ff47.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/data_mining_software_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fe254cc57b75.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/how_he_loves_chords_key_of_c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_600df87be3efd.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/iT5ghhP/59253594623.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/j3Qgegf/83865344786.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/KgeWoje/wow_video_call.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/3844147326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff946bb0fb69.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/djbyqgi/8985371913.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/what_specific_techniques_are_used_in_the_cognitive_behaviour_therapy_cbt_approach.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/shiK239/conspiracy_movie_2001_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_602d03c527e52.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/07c80907-5607-4877-87fa-bcfc702d32ee/12644213403.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/tezesukadevakuw.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/fundamentals_of_computer_graphics_marschner.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/zoxagawefopirevifetogulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283bf7e7-c89a-4b37-9414-e5e81c166c6d/sewevawuguzolozarogigosir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/842f983d-5654-4ebf-a947-688923d58fcd/does_logitech_k360_work_with_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e861cbc-75e7-4ac7-b070-8161c0400976/22927541592.pdfIn PDF document text
    • http://mawokale.myartsonline.com/how_to_teach_main_idea_4th_grade.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_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 5420 bytes
SHA-256: 99b3a5357e83dcf91a47a8416e0a732ab28e921ad826c58ec460d3181107ffb8
font_01_sfnt_off00010a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6F 10312 bytes
SHA-256: 7e35703f7d9af3dd8ab4e76d343224b3376f485330be9ea185d63b31c4690b4b