Malicious PDF — malware analysis report

Static analysis result for SHA-256 3088b1fffd5b19a1…

MALICIOUS

PDF

63.8 KB Created: 2021-03-05 23:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f96fea612ba2409af90ec1be7a95777 SHA-1: d055fa6b8ba5067183d50dbec4d5fc08314c4e06 SHA-256: 3088b1fffd5b19a1cd70e48aa9c48aa97c0ae4949d9071e663c225f2fefae16c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/wix?keyword=minnesota+gopher+wrestling+twitter PDF link annotation
    • http://xasumemazekejo.scienceontheweb.net/42380185884.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/job_interview_questions_and_answers_for_fresh_graduates_call_center.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/fafazisarerofudawo.pdfIn PDF document text
    • http://uablog.website/pewexezazufopuztfuwn.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/13306994049hioqy.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/gijaveramex.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/9cc90344-59d3-4921-a197-44596b866176/best_robot_vacuum_review_2020.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/the_rising_of_the_shield_hero_season_2_release_date_anime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666e52ee-e04f-4b1e-9c7d-c09f1701990d/samsung_universal_remote_setup_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/35256271167.pdfIn PDF document text
    • http://kixazogegome.epizy.com/xoxijisebuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f8ab76-9237-473b-9788-8ce738e45dbd/how_to_program_your_genie_intellicode_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/dixuluzoma.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/how_to_edit_text_using_paint_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/93913132769.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/bomojofolixiwozeset.pdfIn PDF document text
    • http://lubuzasoxevixan.epizy.com/wawolonomawumilolexid.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/39560020006.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_off0000c1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CA 5180 bytes
SHA-256: 9eee76e57574625c897309a05ce61dc63545da1edc7c83d1dc51c4b15eb7db32
font_01_sfnt_off0000d37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37F 9108 bytes
SHA-256: 6fda51471a3f47662499401fa9e4ea64667529966d53113368ce754018328312

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