Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba571f1e8ab9042d…

MALICIOUS

PDF

73.3 KB Created: 2021-02-06 00:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ac16136fae928a696b260b2f239cd05b SHA-1: acc0fd7423ddc1a12b14301d7b3199ef0d685e89 SHA-256: ba571f1e8ab9042d588d7821a87801f0e4af0d794a541e6442a31c21c4a7d0b7
186 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily corrupted, but the presence of URLs and the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=bien+dit+french+3+workbook+pdf+answers PDF link annotation
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/4785821.pdfIn PDF document text
    • https://wilumixomili.weebly.com/uploads/1/3/1/4/131483065/gamupujogo_dowaza_dinozi.pdfIn PDF document text
    • http://rat-red.space/auto_clicker_free_download_for_androidcc7bk.pdfIn PDF document text
    • http://noksipals.online/tepef2r0zm.pdfIn PDF document text
    • http://walkover.me/marble_legend_gamejznfu.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/84bf130040c.pdfIn PDF document text
    • http://onsideball.info/techcrunch_extra_crunch_live9qjjy.pdfIn PDF document text
    • http://nubolats.xyz/tuzugovukabezowinogepitkm32.pdfIn PDF document text
    • http://astrohelp.space/77189437260byu8t.pdfIn PDF document text
    • https://jupawipomilat.weebly.com/uploads/1/3/2/7/132741176/372366.pdfIn PDF document text
    • http://reduslim-europa.site/site_reliability_engineering_github1onyv.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/gdZKhiU/lomelujew.pdfIn PDF document text
    • https://bununijadepijag.weebly.com/uploads/1/3/5/2/135298825/d092e3443a3d6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fce3f2b126cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_6019bbf955a76.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/jcStjik/amazon_fire_tv_4k_stick_manual.pdfIn PDF document text
    • http://svoydvalend.xyz/knife_master_vs_fruit_hite6j2s.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/pobogovitumogemezu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453337/normal_5fe4445d6b95c.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/4iejjk2/42308688288.pdfIn PDF document text
    • https://cdn.sqhk.co/lokatatape/88vgifn/domino_s_workers_strike.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/bavokek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 5720 bytes
SHA-256: 9623fae1c12e44f01a1f58d495a68d9515437667f18d689dabef9be230e2311f
font_01_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11132 bytes
SHA-256: 96236efc4097183855d29156acf2d344e83966e8fd5065aff09d895e305b2d6f