Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d78b334b9a8331b…

MALICIOUS

PDF

75.2 KB Created: 2021-05-09 05:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 302838cccb8c6ab6fbcd49fbe82b7d06 SHA-1: 11926809c0a6bde262a415e6d0a38826ac468178 SHA-256: 0d78b334b9a8331bb1fcbe54393f7cbe417359fd8ab898bb0048d2006641efda
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=little+shop+of+horrors+plant+name PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4f158947b2.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/headway_beginner_teacher_s_book.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/how_to_sync_skullcandy_indy.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/jihh0wP/kalitabulabavizuburabupal.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/poxudubezafevariseveluvo.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/IggphaG/universal_paperclips_guide_stage_2.pdfIn PDF document text
    • https://cdn.sqhk.co/sewenajete/chagfbM/71526713951.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/MsQjaWY/slide_away_meaning_genius.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/f5yigjh/5007080468.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/hijigfm/69554594191.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/ihhjRXt/can_you_freeze_candied_lemon_slices.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/aegejcm/woodshop_clarkston_catering.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/advertising_strategy_creative_tactics_from_the_outside_in.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/0hggfDt/slam_dunk_2018_lineup.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/texas_used_car_bill_of_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/jigahbm/4137460679.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/milul.pdfIn PDF document text
    • https://cdn.sqhk.co/zirixegip/flbGH8w/global_lending_services_complaints.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/dofojesolaton.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/cXy6mjj/bluestacks_macro_recorder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_6047723e91f5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavuduvolilazod.myartsonline.com/togifolilo.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_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 5084 bytes
SHA-256: 4710c6a81decbdbb688fc626eb269c2d5ad46f23dbeae168b4e2d65660422208
font_01_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 10944 bytes
SHA-256: 53820d5c1dba134099ea854f631fa6f108bea3836aabbf8590453d90661de073

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