Malicious PDF — malware analysis report

Static analysis result for SHA-256 df951e107ded897c…

MALICIOUS

PDF

91.6 KB Created: 2021-05-13 07:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1cdaed793621b2328a6e574298a22f4b SHA-1: 22ceca4e5a1787dc3f3204aadfed894ef17c97a7 SHA-256: df951e107ded897cd67b672ffd3bdfa5f4089c9bf23e568ac0b6fe73f4b59142
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=will+ps5+have+gta+5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fe7f25bc8fb2.pdfIn PDF document text
    • http://carbackseat.site/art_book_dark_souls_3_design_worksnec04.pdfIn PDF document text
    • http://demask.space/319509898188naqb.pdfIn PDF document text
    • http://natnat.fun/manual_autoestereo_jvc_kd-s29qsfil.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/HKDhbgi/9521731715.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/FidgcOR/56493910524.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/gijwLkE/papa_s_pizzeria_hd_free_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/VpbP1Dj/jepaz.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/hggihMT/drag_racing_club_wars_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_603180548a0ea.pdfIn PDF document text
    • http://profaudit32.ru/avalon_newport_pellet_stove_insertymi7q.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/egdhdFw/61467860531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_5fc712c79e05f.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/MigghZn/tip_top_games_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/hZ5rggS/real_free_football_prediction_site.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_02c5502084ba4846b7f9d18121a71105.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/kotapedubugadase.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_6af613ba27e84558bbdfb221ad12ea8e.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_78983d2a136245feaa33fb7805644e59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/29131108839.pdfIn PDF document text
    • https://0c1adbbe-b65a-4c28-9da2-87cea21e0636.filesusr.com/ugd/496951_79605aa2daee4ce988b81f8908c03725.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/wedding_wishes_hd_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/chale_aana_whatsapp_status_video_downlod.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_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 5184 bytes
SHA-256: 94b8162822efb3329f825a47546799dc656a49787586006065a2fc251a5556d9
font_01_sfnt_off000138c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C4 11956 bytes
SHA-256: 3803d1edcc635fec27419d7bbd284326c1ce3ab91323a356fbcf44eab8df8984

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