Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ace904ebdd8b77a…

MALICIOUS

PDF

84.1 KB Created: 2021-03-24 17:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4d3386494e53fe460ced0b7154e45d7e SHA-1: 219ffda763463f3719f88996918236c46155c035 SHA-256: 7ace904ebdd8b77a04a60db27cfed73710f6c178754315486205803124457272
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image related to optics to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://dugedepap.ru/strik?utm_term=what+is+light+absorption+in+optics, is the primary indicator of compromise and likely leads to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=what+is+light+absorption+in+optics PDF link annotation
    • http://kolagozisil.mywebcommunity.org/51674699382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_60550365987b0.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/what_is_in_a_functional_specification_document.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_60514ee8f3118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_600d8150ba703.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/gjeicid/necromancer_story_hack_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_603bd83e83fea.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/ib0CNij/nebikojobufojatolerofoma.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/heGjaha/voa_news_radio_online.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/9e8b4595-d803-4961-91e5-0262bb1c89ef/lipilokarutugutelamojozuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/foxit_reader_merge_two_files.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ecdb0c-b19d-416c-879b-562c34bef9c8/miritepobufalubosewima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e966af-c63a-42eb-a7be-f558f1b19cab/30324531847.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/nejawovojepeba.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/nurimekotonix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977d0042-7166-4bbf-9286-f4028bff877d/31213247755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ebbb01-b532-4d1c-923e-525162072b4c/sarabakozofuvu.pdfIn PDF document text
    • http://larovitivejel.atwebpages.com/autocad_2d_and_3d_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/55840145727.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 5348 bytes
SHA-256: 0ec31f3d539d4c78a47d67743e7b8cd87048e8f104e6aa6c648ce1ce8514da93
font_01_sfnt_off00011cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFF 11392 bytes
SHA-256: 42d554bb74b38704b27b075aa25c458ada87498a405d55f7e2934dcc6b1ebf74

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