Malicious PDF — malware analysis report

Static analysis result for SHA-256 0581ce5b85f0fd86…

MALICIOUS

PDF

79.2 KB Created: 2021-05-27 16:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4ca10c64e0bb71fac8836b68419cd7f SHA-1: aeef4da75eb3dbc939780d2a508f8064fa8f225a SHA-256: 0581ce5b85f0fd86893a4184c37e3343f2ffc7d314844f66fc3f167b015bcedf
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=monsta+x+jooheon+tipo+ideal PDF link annotation
    • https://tuxatijofewimem.weebly.com/uploads/1/3/4/6/134686538/f4e7a1ab.pdfIn PDF document text
    • https://kekipefawaro.weebly.com/uploads/1/3/4/5/134588225/f16b17a8352.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/9b2aba8.pdfIn PDF document text
    • https://dunebuka.weebly.com/uploads/1/3/2/6/132682868/jafujagulexad_xebolukaloga_livamonebewepij_vufufajokofode.pdfIn PDF document text
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/f03bea02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5fdef4b84686d.pdfIn PDF document text
    • https://siwetoro.weebly.com/uploads/1/3/0/8/130814297/8088566.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/9003085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_606662c6529ca.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/furujape_vewowar_xikixa_xinamotu.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/piparoru-sipefazeromomi-nuzezosesap-tabalo.pdfIn PDF document text
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/jufelen_gapoxobus.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/6177092.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/ca157471-2954-4375-ad01-9a214d57b262/43946741912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f24626-5ee5-4234-b37d-5ea647028a76/diary_of_a_wimpy_kid_the_long_haul_full_moviedaily_motion.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_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5100 bytes
SHA-256: 59e8ebaeb3cf190c53177f166837dc0822cad25cd580da9225d04a7002e9f764
font_01_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 4440 bytes
SHA-256: d33d21edc8f5136db033a41b09d6dea7f7f0062a29e3903fb49e28bed774b222
font_02_sfnt_off000105b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B8 13224 bytes
SHA-256: be0c24dd660266ac9d87b7115c2eec146f8deeb2ab6a3bd244516291faf6edec