Malicious PDF — malware analysis report

Static analysis result for SHA-256 55088fe84d77790a…

MALICIOUS

PDF

59.5 KB Created: 2020-11-17 22:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-04
MD5: 7c4e44cc21a67e5be8ab26a0b4cebc2f SHA-1: e04f2e29f07a70ac422ed51b51de06140289c97c SHA-256: 55088fe84d77790a144c5a67ba71e63aeccf1c732a8146212dce63bb409776b1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://s3.amazonaws.com/fizup/jorozop.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5f989aeb5aef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f8c0f90e8bbd.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/wosunugedepikus.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/1340481.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/b056072.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/eaton_air_compressor_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/dawifikewifikezudixe.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/mcmap_green_belt_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5f9d4e3bdfae2.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/sibobakotowil-vibebapixeni-sosuviverudog.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/085e8efba9fb565.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/potivefotofetenove.pdfIn PDF document text
    • https://trafficel.ru/123?utm_term=patton+laboratory+manual+answers+eighth+editionPDF link annotation
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000abeb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000abeb.bin)
    • https://uploads.strikinglycdn.com/files/2bb8cff9-f93d-407c-b24d-af4180680fe2/zowupikavinaxezapoz.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 extracted file (font_00_sfnt_off0000abeb.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEB 5572 bytes
SHA-256: c74263e8cee1781bd37cc0ecaa8fb81f3b465ee9df67967117b2dd518b415d9a
font_01_sfnt_off0000bec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC1 10004 bytes
SHA-256: a8f28fe7dd815ed7197415b05b8ba6338f301e3a994425966d13e6c097e8c2ca