Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8d3d5634a43e52…

MALICIOUS

PDF

81.2 KB Created: 2021-04-03 17:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfbcc74844cd454225085b20c61764a6 SHA-1: d520380b268f9c4c71ddf3b91e85e289972e6274 SHA-256: aa8d3d5634a43e52f4c9e529f4edfbedda46227f037371db374fc0f9ca17d285
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and uses a lure related to default router credentials, indicating a credential phishing attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests it may also be used to deliver password-protected archives, further obscuring malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://xexunejakex.weebly.com/uploads/1/3/4/2/134266262/6c1dd3e9f.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/strik?utm_term=what+is+tp+link+default+username+and+password PDF link annotation
    • https://xexunejakex.weebly.com/uploads/1/3/4/2/134266262/6c1dd3e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5ffe5fc19750a.pdfIn PDF document text
    • http://tryici.xyz/how_to_find_the_year_on_a_kawasaki_bayou_300519xr.pdfIn PDF document text
    • https://latuxuxapeja.weebly.com/uploads/1/3/0/7/130739017/nituzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5fcd30ef581bf.pdfIn PDF document text
    • http://lopozodedawap.22web.org/limopu.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/ninadagajopafeso.pdfIn PDF document text
    • http://ipoteka.net/mumedunezopunovikivodowhkt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_603a98204167b.pdfIn PDF document text
    • http://domsale.xyz/egyptian_gnostics44zyk.pdfIn PDF document text
    • http://on24-system.club/xanogonujutomptfry.pdfIn PDF document text
    • https://jenosexafunira.weebly.com/uploads/1/3/4/6/134686035/kaniref.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/ximuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388048/normal_60095e46d55a9.pdfIn PDF document text
    • http://wesused.22web.org/how_to_reset_westell_7500_router.pdfIn PDF document text
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/nudubobekis_zexujumufodupe_xomaxusivixi_domogut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489237/normal_6006b87a4ba32.pdfIn PDF document text
    • https://bixizevabusiku.weebly.com/uploads/1/3/4/4/134403351/bakejijararuvifazujo.pdfIn PDF document text
    • https://bezatawe.weebly.com/uploads/1/3/0/9/130968967/tulazazerekalez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagowavez.epizy.com/takuzunajozazededadinaru.pdfIn PDF document text
    • http://gelutusuxipedib.rf.gd/dajugafefiwaxefoni.pdfIn PDF document text
    • http://mikugux.rf.gd/27611268021.pdfIn PDF document text
    • http://midejoxujonaler.rf.gd/29407799104.pdfIn PDF document text
    • http://migumirokive.epizy.com/does_bully_dog_gt_tuner_work.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_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 5448 bytes
SHA-256: 9a1fc7e15bd4cf406fe758bf353ef9fda3f5ddacdbe4c12a670063cf26b304b0
font_01_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 3120 bytes
SHA-256: 2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d
font_02_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 11536 bytes
SHA-256: 4c9e63fd5c2f7bf45413b2b0d18774feb8d535188bc116c431feec3063bcffad