Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd52ae5e35673aa0…

MALICIOUS

PDF

83.7 KB Created: 2021-02-28 08:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3738bb8d7446df8b5635c31075f961f1 SHA-1: 948d49092d366f904b8f20303b1f89b286c23910 SHA-256: bd52ae5e35673aa0ce48f7a93c5a2bcbb521354cba688752f59abe8d28d08800
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content. The presence of a 'Brand-impersonation credential phishing lure' heuristic, specifically impersonating Microsoft, strongly suggests the document's purpose is to trick users into providing sensitive information. The ML classifier and ClamAV detection further corroborate its malicious nature, likely serving as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://welukixavise.weebly.com/uploads/1/3/1/0/131069839/332.pdf.
  • 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=al+tawbad+general+trading+and+contracting+company PDF link annotation
    • https://cdn.sqhk.co/lorotukogof/sMDpjez/42150579689.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/cuanto_tiempo_puedo_tener_el_carnet_de_conducir_caducado.pdfIn PDF document text
    • https://welukixavise.weebly.com/uploads/1/3/1/0/131069839/332.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/2771799.pdfIn PDF document text
    • https://lukawonudos.weebly.com/uploads/1/3/5/3/135320707/8948595.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/gizugofomijuzo.pdfIn PDF document text
    • https://besuweleterum.weebly.com/uploads/1/3/2/8/132814030/2566246.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/wanuwuzofinaxa_jemedijamazogo.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/best_electric_ice_cream_maker_recipes.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/xunesinixopape.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
    • http://dijasogowupa.rf.gd/jekenizasid.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/59015277484.pdfIn PDF document text
    • http://gelutusuxipedib.rf.gd/zavolotuxojevalalopob.pdfIn PDF document text
    • http://bigisewolax.epizy.com/kit_dls_2019_juventus_2020.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/how_to_hook_xfinity_cable_box_to_tv.pdfIn PDF document text
    • http://vikogen.epizy.com/resume_template_for_lots_of_experience.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 5324 bytes
SHA-256: 0a58bdb7e9f404a1198957833edc863841df539d09f3b215e0befbe723dcd64c
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 10752 bytes
SHA-256: a6f7bfe18d6a4eb1dc33d00def60de5f80fd68a28b0220662f2d41638a0a1c34
font_02_sfnt_off000132e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e