Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f3cf5759c6f5b1…

MALICIOUS

PDF

79.5 KB Created: 2021-04-04 14:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 58544a253a35a995e9b09056f907c100 SHA-1: d2cb6f510ebb996c097c881db5c5b4df0caaaae9 SHA-256: 76f3cf5759c6f5b1b96b40c32bef2b6ed705325fc8ee6c6c54b64fc71a0e43fb
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and an SEO redirector for phishing. The document body, though heavily obfuscated, contains text related to risk measurement in sports, likely serving as a lure. The primary IOC is the redirector URL, which is likely used to host the phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=how+is+risk+measured+in+sport PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fec9653ccb86.pdfIn PDF document text
    • http://samyog.ru/la_biblia_continua_serie_completa_espaol_latinobob90.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/49647736438.pdfIn PDF document text
    • http://bitsracing.net/what_is_the_meaning_of_strip_croppingrhfmx.pdfIn PDF document text
    • http://parhelifrl.space/besaxujegodulifudutukatirxfp5.pdfIn PDF document text
    • http://cooldomen.space/sony_playstation_vita_2019dw441.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/wifar.pdfIn PDF document text
    • http://scarcebook.com/tevomukakolixejotidemthqrz.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/free_online_electrical_engineering_courses_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/what_color_is_my_period_blood_supposed_to_be.pdfIn PDF document text
    • http://sollabs.xyz/54975162060ocle0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_6060de97edb5c.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/shark_portable_steam_cleaner_sc505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_6005b4c96ec14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_601d244748afc.pdfIn PDF document text
    • http://samo-katim.ru/40924124936wucdz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_ae21c48d440e4eed90fa335abeaab7e3.pdf?index=trueIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_b7401daa7fbd43a48a468a419059fdd7.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_6f34755ebd644bff8b2b3c6db94538fa.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_75983a9aa9a943d9bd34d7a349f6538e.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_c5d8e446954840178a2a9353ab3e60f2.pdf?index=trueIn PDF document text
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_c1460bcfc2ce423f9a249055bc091553.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 5072 bytes
SHA-256: 2acf565687daeb06a4345c1f43369045766804af703478e80ad3d50079afa861
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 11156 bytes
SHA-256: 33e5d307fc9a3a44fed467d03f7933438ee3ca7b5839dc8e6ad370b134e92cce
font_02_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176