Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8beecfb2c90c16d…

MALICIOUS

PDF

66.8 KB Created: 2020-11-09 18:17:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: d8c031cca4f589ad0962f2cdb83656bc SHA-1: 27d079633bd3d153f0b1d232905fd33e3c4cb540 SHA-256: a8beecfb2c90c16da5ed794775b16f5321714edcc88968a8f26758e3478cba1f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/wb?keyword=apps%20for%20caller%20identification PDF link annotation
    • https://s3.amazonaws.com/ribowexulo/ambient_weather_station_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5f9887d5831af.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/keep_on_the_borderlands_map_ddo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_5f94c4b4d8b9c.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/kawasaki_small_engine_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5f9b0c744ccb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_5fa74a2143cf9.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/maruj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_5fa692b5241ee.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/luneno.pdfIn PDF document text
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/6083247.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c8e4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c8e4.bin)
    • 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 extracted file (font_00_sfnt_off0000c8e4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E4 5140 bytes
SHA-256: ae499fcd02473739cd0ab0070de4976a43676aab7b6962db89e5f8a51a47ae84
font_01_sfnt_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 10624 bytes
SHA-256: 414f9185b7d2538de0c042fd799091ee13dc77933c1a540ac9d5a4ae9c8e6e9b