Malicious PDF — malware analysis report

Static analysis result for SHA-256 10131c48c66898df…

MALICIOUS

PDF

78.4 KB Created: 2021-05-07 06:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1fbc3c418b39c203d33f0d9b46afaff6 SHA-1: 955cf720b88bd01f3ddde3a4b4a8d2560b285f95 SHA-256: 10131c48c66898df250e0d013126b53ec7cf6337464d6639ba84dbfb43e6a6a7
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The document's content, though heavily obfuscated, appears to be a lure for song lyrics, directing users to potentially harmful websites.

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://zajinet.ru/strik?utm_term=m%25C3%25A1s+all%25C3%25A1+del+sol+letra+y+acordes+joan+sebastian PDF link annotation
    • http://stroymarketmetal.ru/594577319875fkdl.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/1YRjhUE/10583800765.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/ggVs0ZN/15553654169.pdfIn PDF document text
    • http://alteramaks.world/how_hard_is_dark_souls_3_dlcvt12n.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/mubizikizaliwedul.pdfIn PDF document text
    • http://lanizimugigil.getenjoyment.net/rrb_je_cbt_1_book_free_download.pdfIn PDF document text
    • http://dayzcommunity.info/07_kicker_cvr_12_specs9rlfc.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/6MhfVjb/97717518463.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/eAjehgf/33002256611.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/a9da1fe9-7a68-45b7-9005-07a875f8345e/does_the_american_red_cross_offer_phlebotomy_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e645f29-6019-40f6-951d-2a987929c737/highway_safety_manual_crash_modification_factors.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_d13b08adc9964486a87f18498df6331e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29c2256-a64a-49d6-9e69-fc25478bf5fe/que_compuesto_es_el_cianuro_de_hidrgeno.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_b14279c87b454294bfac6c6a75455c71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c846da-2e63-4be6-b43f-171aa8e696c4/what_about_law_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefe1761-2559-474f-905f-40b8628892ae/82379294558.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_1c809c05f3ad4cf6a7d91e32a7fee8cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b33915-baad-408e-a39d-eecc762b4256/omron_model_hem-711acn2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 5492 bytes
SHA-256: cffd3371878847bfa8017b425d07b7b81ce22109d655c201062a434d771fd802
font_01_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 12620 bytes
SHA-256: b1dbeff4f6a9a6616b27a24fe6b298a499c334ce4287dfd7b153db64e7aa824f