Malicious PDF — malware analysis report

Static analysis result for SHA-256 9879da1fbd4e5c00…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 17:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b0b361546bc9d8aed8729be80d046ff SHA-1: bc951e5b5780a5a846f9e091e859c30ae8a1bb15 SHA-256: 9879da1fbd4e5c00b3efbe00da46521d706cd91185ae624b54500910ac015d8d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself, combined with the heuristic firings, strongly suggests it's designed to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

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://leonvi.ru/award?keyword=describe+yourself+essay+pdf PDF link annotation
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/mijizikurawevakogejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5fca4457e0fed.pdfIn PDF document text
    • http://rerikadarax.iblogger.org/bond_indenture_covenants_balance_sheet.pdfIn PDF document text
    • http://1xbet-football.fun/me_alone_survival_zombie_experience_nearluxps.pdfIn PDF document text
    • http://mybatut.store/benim_hocam_corafya_2018rpsog.pdfIn PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/wotugoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/mystic_messenger_lolol_email_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fd117a4e8d55.pdfIn PDF document text
    • http://instas.site/kudesekvctu.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/fanuc_10t_programming_manual.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
    • https://uploads.strikinglycdn.com/files/b3149dab-0103-4b88-9515-7656855956b2/zepufidarobuvula.pdfIn PDF document text
    • http://bitediwufekoxem.epizy.com/midigikokutoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529a264c-2ca3-49b2-b84a-f1cebad83bee/61251438026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f693188-5583-457c-9f39-c33090edea9a/is_snapchat_a_dating_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d96442-e521-4e56-8f4c-9e8d4e8260fb/dodge_avenger_2013_oil.pdfIn PDF document text
    • http://vefenuratowagu.rf.gd/filsafat_hedonisme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba15410-63cc-43aa-bc5b-4417a3e265d3/focusrite_control_2.3.2_download_iso.pdfIn PDF document text
    • http://sarirepenibe.epizy.com/baketitidofusadogumoli.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_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 5084 bytes
SHA-256: 4643a89beaa3ac570dec82d16e5447412bce6b5aff7e1750e96e32149c85d32e
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 10620 bytes
SHA-256: cce9105b234954356f8d6d3a4c22ea599e42585c0213e2e4cfa43108a64d16de
font_02_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3