Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d840a23ff746f7…

MALICIOUS

PDF

76.7 KB Created: 2021-03-11 01:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a7b38a797057cb2803255c55c25aedc8 SHA-1: 1b16e6fb9a1fb0d363cc7e190635f4b77abd3420 SHA-256: 75d840a23ff746f7897b8af51527cb854fce9a5c896c0eaacf390368b5bee93d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=pc+building+simulator++portugues PDF link annotation
    • https://cdn.sqhk.co/gixedomawa/Rhfiaid/washington_h._e._r._o_homebuyer_program.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_60480a3f16922.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jjfjdhg/50051193225.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/zAjfcv2/expanse_season_4_episode_6_recap.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/hdgjgg7/seselomemogojewuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_6017accacb543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5feafc2aac7f6.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/hjj9ja6/depepowawedutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_6028109205311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_6026eae145c27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470687/normal_603908b9cf202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sifebina.epizy.com/firefox_32_bit_free.pdfIn PDF document text
    • http://jofifabe.rf.gd/review_on_lights_out_2016_movie.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_af681994675c4748a6998c6d1f9a227a.pdf?index=trueIn PDF document text
    • https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_89563615ce2646789b040935f6b31876.pdf?index=trueIn PDF document text
    • http://rasezufolob.rf.gd/torubukajukunupiwu.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_858c14e4653440fd8ac24fc6df70b47f.pdf?index=trueIn PDF document text
    • http://negifunowulag.rf.gd/how_to_connect_jabra_talk_5_to_laptop.pdfIn PDF document text
    • http://kedokonox.rf.gd/2003_cadillac_escalade_ext_manual.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_6744b75de94b4b79a938eb3ecb783414.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD577 5536 bytes
SHA-256: 7e699031feec4b87eaf3c0a323eeedf4bdd3df126f099dd0c55c7ddfc6815d01
font_01_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 11744 bytes
SHA-256: bf22275fd260da415b13ca7f2252fd641aa8bdbd48ec6c6017c713ec72e5b8b5
font_02_sfnt_off00010e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E36 16132 bytes
SHA-256: ccf879661c26e8d85a43d4fcfbba60320246430dcbf46b047d24072eb45b37a5