Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c570832a0c1da69…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 06:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cbab429522723053be62188b6112669d SHA-1: 1215f19cb83bcb4fea83c668e8debe72e56b6a89 SHA-256: 7c570832a0c1da69cc95d835f8be2c2cf6488d0c6ebca2c6eedec71b785cd5f4
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://botokaw.ru/strik?utm_term=caddx+nx+8+lcd+user+manual PDF link annotation
    • http://myfavoritesun.xyz/acido_sulfurico_formula_molecular9tnui.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hdhaPY2/womiwivojuvovusemebev.pdfIn PDF document text
    • http://cmbmarketing.agency/gmat_prep_classes_onlinew4pvx.pdfIn PDF document text
    • http://ens-pictures.ru/82910642452m2fck.pdfIn PDF document text
    • http://discout.online/holmes_tower_quartz_heater_with_max_flowexpjd.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/ifgi4ge/average_cost_of_a_wedding_dj.pdfIn PDF document text
    • http://idealsit.space/gegizonewidorerizojeza3vcp8.pdfIn PDF document text
    • http://vykupavto54.ru/69933931255xv0kj.pdfIn PDF document text
    • http://shop-onlain.fun/9866873014ith0o.pdfIn PDF document text
    • http://devicesprotectionforusers.site/letter_of_recommendation_for_college_acceptance_template70ohz.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/7d35b4c3-00da-4810-8b13-cded937b4693/sueo_de_una_noche_de_verano_obra_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e1d894-5e72-4c91-81e9-8ac875259d63/vogaxowudetunonewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22d1330-0ee1-4c2a-99e3-98cfeaca4fb2/baby_girl_nike_shoes_3c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3174159d-c3eb-436d-8e51-5b4d8d2ce845/63956676214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a262918c-010d-487b-b657-23b3e541c682/45013771991.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/actonel_dosage_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6e6e74-9b1d-4023-94a4-c83617b1f52d/73342264512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbaacdd-faf0-4107-8d8e-ac4ecb72039e/how_to_paint_a_palm_tree_with_acrylics.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/cert_triage_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aaa192c-077f-4ca6-abd8-866365f5f3f8/nutebonobofelavezedak.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/10106793216.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/abbaigaru_mp4_video_songs.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_off0000f58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 5252 bytes
SHA-256: 284f0158f2cdfbdd0900fdc977364dd71973265cc66d57b83eeb882b225e5784
font_01_sfnt_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 11144 bytes
SHA-256: 570c3300180bcc04cd471f9a2a7015501ea8aaa953dfca8fae02e85b345e26bf

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