Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e183a6acae36ffe…

MALICIOUS

PDF

78.1 KB Created: 2021-03-08 21:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 39cd8216bf9d821eb484971d22910bdc SHA-1: 4a8589385392daf54bc9f41f003e69521c3b9f52 SHA-256: 6e183a6acae36ffeeb055b4a3a52699dd154dc35a5d9af58e6725199a7096c0f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL suggesting a lure related to English adjectives. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/award?keyword=oraciones+con+adjetivos+calificativos+en+ingles+pdf PDF link annotation
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/dinupisafuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_604645c53ade7.pdfIn PDF document text
    • http://jezefumivodasaw.22web.org/kewulamexokoxutod.pdfIn PDF document text
    • https://bixedonaxube.weebly.com/uploads/1/3/4/6/134619794/cfbc2b548ef13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5ffb9f318f71c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503390/normal_5ffac092840e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60199e0052bdf.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/jjRjhO0/vagipatakowuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_60216cf1024f5.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/dewozowe_daxegibadapa.pdfIn PDF document text
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/9587688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_601a860c9f61f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_6033e9361059c.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/hif8Xid/84868455275.pdfIn PDF document text
    • https://cdn.sqhk.co/zagekexeroze/lX5hegh/62331117941.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/bjcKhi4/vintage_race_car_game_download.pdfIn PDF document text
    • https://wokogosomexar.weebly.com/uploads/1/3/5/3/135322546/gopapisu-tekalulajajaru-difudoko.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://lajirobodogew.epizy.com/domuvuzex.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_48f955ceac614832b5dec1bcb64e0b68.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_c50fe16670cc4e9a9a01e082988e878a.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_79bd484098c5479bae78ebe4b40c5111.pdf?index=trueIn PDF document text
    • http://lixanixuzuki.rf.gd/breakup_shayri_photo.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_4fb7a81c69b745c5871e0e262a2c4f65.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5272 bytes
SHA-256: b4701fd3409e7460455a34847353ec94e44768866cfb64b7bbf0654e97f096bc
font_01_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 11820 bytes
SHA-256: e7f40d5977cb5cc287f9e588f79d2ef68f8666333d2910a92511e11633ea99e1
font_02_sfnt_off00011a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A99 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2