Malicious PDF — malware analysis report

Static analysis result for SHA-256 486f293ae70a5c00…

MALICIOUS

PDF

68.6 KB Created: 2021-03-03 12:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3570c93b09a17a088096ce24705c120f SHA-1: 967e2101edda79b7bdf2bbdc157643a56816b0ba SHA-256: 486f293ae70a5c0066e22c26cd344fdf30bb5f5c608e083fc50e6567872170ac
126 Risk Score

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://mezovuduw.ru/wix?keyword=grade+4+module+5+topic+a+quiz+answer+key PDF link annotation
    • https://cdn.sqhk.co/zijikunu/difIVij/fandango_latinoamerica_movie_times_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/didozakir/jhgijjf/new_escape_room_board_games.pdfIn PDF document text
    • http://belixawotid.66ghz.com/12166877031.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/why_is_my_spectrum_cable_tv_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/nonofukunumu/ijdhgii/kavizibekewegatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fdb6d9546c00.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/ia26iht/dowemepirikir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503033/normal_602fb5ade8e29.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/VhggjKo/vimemilikovivesan.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/hjnIdid/movie_editor_software_free_download_full_version.pdfIn PDF document text
    • http://xulagamefedaruv.22web.org/16877061185.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/vgjDphf/scary_horror_games_evil_forest_ghost_escapes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://goxoloxegaw.epizy.com/speed_seduction_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/30742699177.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/10044538546.pdfIn PDF document text
    • http://guputawa.rf.gd/bekorewujemelon.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/68479961036.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/xajaniduzerotu.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/solo_parent_leave_law_philippines.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_off0000c409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC409 5896 bytes
SHA-256: 70839f2f450303760640a0886399d8e736fb8730eb421c90310e8b8005677c6b
font_01_sfnt_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 13756 bytes
SHA-256: 120bb336ba6d00b7b4b00ce024c835e3ff2fa90eaf1b4c441a50cb49d51bbcb7