Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bb81287a216bee…

MALICIOUS

PDF

68.7 KB Created: 2021-02-22 01:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 08a20d9e0af5babd7bfe65c61725bef2 SHA-1: bb49db1f5fce718585574b1541593a84f75017e6 SHA-256: 59bb81287a216bee7551c6ddd67e8f1bded053dd027df84ab6ed7c5c8992bcc9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://jottigo.ru/wb?keyword=how%20much%20does%20it%20cost%20to%20replace%20a%20head%20gasket%20on%20a%20pt%20cruiser PDF link annotation
    • https://cdn.sqhk.co/vesagivara/iieZwjg/college_football_coach_career_edition_recruiting.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/dIgixFN/vizisebosawidegowu.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/fjaoihY/29498274398.pdfIn PDF document text
    • http://ins.expert/spendee_free_alternativesnfdkv.pdfIn PDF document text
    • https://lipopujowojirew.weebly.com/uploads/1/3/1/4/131408954/kimoguxenodamav.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/manco_go_kart_parts_listsw159.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/ggiaENd/url_video_player_apk_uptodown.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/7816714.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/tiluwisulepam/kobamujupelanilimu.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/66497509092.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/18005634029.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/optical_fiber_amplifier.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/engagement_invitation_card_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/kunukufuforo.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/hive_orc_vs_parquet_performance.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_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 5604 bytes
SHA-256: 47a18940f16f47ef6d5554998ce0d3c90df690bbc05316f5e6ce06d8a0a4e4cc
font_01_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 10464 bytes
SHA-256: 64676dfb47355bba8d64b8599ec3a470d2a4ffc06c567300eececa58c9e17890