Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d869c5874d8fc74…

MALICIOUS

PDF

84.7 KB Created: 2021-04-01 21:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b368e8332862cccb2815993806d97bca SHA-1: 5e3266d9b4a7f4167b82b620d06df850cb7a0b7e SHA-256: 5d869c5874d8fc7438f35a88d0f565cada9d03356cacc1da0e78969a0ba252f9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://seumenha.ru/wix?keyword=geometry+chapter+8+practice+test+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5ffc66e4966ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_6063f8285c205.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/wezizob.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/2681cf9f2bf.pdfIn PDF document text
    • http://game-pro.xyz/sat_books_to_studyi5kc9.pdfIn PDF document text
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/8375920.pdfIn PDF document text
    • https://tusejefil.weebly.com/uploads/1/3/4/3/134320171/wodejiwodebonideboj.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/icyF7CZ/birthday_party_cake_decoration_ideas.pdfIn PDF document text
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/verajopedekijeg.pdfIn PDF document text
    • https://sozuxope.weebly.com/uploads/1/3/4/8/134873608/a7aa8eb0.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/beFjfSK/32292910317.pdfIn PDF document text
    • http://pubgucbayim.com/schwinn_ad6_airdyne_exercise_bike_partsacada.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/T8gdjdX/sesinuzavimenuvavuw.pdfIn PDF document text
    • http://testvvd.xyz/57857456495i0d38.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/4912980.pdfIn PDF document text
    • http://mgacessoria.online/88512355212ddizn.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/xoxemukuseduru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db36a743-e1e6-4c1e-80f9-938529c9ae4a/ultimate_diet_2.0_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45fd29d-f9b4-425e-ad3b-ec1f2ba5d937/how_much_is_the_salary_of_ultrasound_technician.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094a2beb-03ea-4b4a-bbb5-d4615784adc0/zawenavazo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 5624 bytes
SHA-256: 21637f833a7f23f0a927742d2b879f156f280d091eb87c0e7dc1a5959845bb8e
font_01_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 11444 bytes
SHA-256: 9814da9d38fba2602c5ca3aacd4c273daccb4ad5d9b12945cc746123caa28e64
font_02_sfnt_off00012e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E64 16072 bytes
SHA-256: ab6a2d92c6195441154fe03e3add47570783810922a3b82dfc3833ffb97f5f96