Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f087c4c182c045a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-27 10:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3d5595e24c8759f460e66e410ba5ed10 SHA-1: b0b47d17341926adf6f02cee04640a94844c63da SHA-256: 3f087c4c182c045a49bb7edd5a576ba4e886567495bb2c13f1b58f988ec3ac99
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 a heuristic firing indicating it's a phishing lure, directing users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://soxebez.ru/strik?utm_term=cuanto+son+100+gramos+de+azucar+en+mililitros` is likely part of a phishing campaign designed to trick users into downloading further malicious content or providing sensitive information.

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://soxebez.ru/strik?utm_term=cuanto+son+100+gramos+de+azucar+en+mililitros PDF link annotation
    • http://igclienteam.com/sap_agile_methodologyczy2l.pdfIn PDF document text
    • http://premiumpornclips.com/642035189618idd7.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/degGrfb/top_scorer_world_champion_apk.pdfIn PDF document text
    • http://vkysnaya-eda.site/are_transportation_costs_fixed_or_variabletlap3.pdfIn PDF document text
    • http://hiziryigit.online/how_to_write_an_argumentative_essay_on_a_book94nd7.pdfIn PDF document text
    • https://cdn.sqhk.co/goxupolofodi/Bjiifi2/lightroom_iphone_app_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/Ojchchg/rope_hero_frog_ninja_game_download_apk.pdfIn PDF document text
    • http://teatr-art.com/99_names_of_allah_downloadcw8pl.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ajzghia/booster_hashtags_for_tiktok_tok_get_followers_likes.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/HDLujhL/wigaronifeluko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/gomami.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/amyl_formate_good_scents.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/5515248833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff257200-b27d-46ed-bc91-00e91ac7404c/84602123570.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/how_to_pass_the_nc_dmv_permit_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88624f97-d044-4008-a63f-a4e22a766644/75692605899.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/86866276845.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_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 5408 bytes
SHA-256: 17ec495c257f526e648e7a0658854482fcb4ec211959f6927b6c548900ed2a71
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 11940 bytes
SHA-256: 4e756b652320b0ff950b68b4c1297143f672a7e5fd45c067c65157de71328ad7

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