Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc433741a7e404eb…

MALICIOUS

PDF

83.0 KB Created: 2021-03-16 18:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af1d7004a42916f3ba7c0ae6b30209c1 SHA-1: 1ed32c08c515e36ce577026505eb9c251c5fe466 SHA-256: bc433741a7e404ebaeac4c0c3c195b397a6f6750aa03e03fcc605bb0653ce128
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to a user manual. The presence of external URIs indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=udi+rc+u818a+user+manual PDF link annotation
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/turili_nixela_xuxopowifewe_kesij.pdfIn PDF document text
    • http://chtotakoeverti.biz/zolafugkgah2.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/b51fc1474c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446784/normal_603995010ce56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_6010fa454941d.pdfIn PDF document text
    • https://baliwiwun.weebly.com/uploads/1/3/1/3/131380001/4128c087000.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457330/normal_5ff559b45339c.pdfIn PDF document text
    • http://thecet.xyz/film_benyamin_biang_kerok_indoxxifyjuq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_601441a810697.pdfIn PDF document text
    • https://niruzezigup.weebly.com/uploads/1/3/4/8/134889773/sujujos-lidema.pdfIn PDF document text
    • http://nout-prodat.site/clash_of_lights_s1_download_apk_2018kckhv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5fcbe6a5ddca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_600ab85b19f64.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/386723.pdfIn PDF document text
    • http://bilapak.66ghz.com/tenses_exercise_for_class_4_with_answers.pdfIn PDF document text
    • http://lalewenesuku.22web.org/insulated_concrete_forms_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabikobi.epizy.com/jadiwagusuwadagawe.pdfIn PDF document text
    • http://sesosufavi.epizy.com/roadmaster_bike_24_inches.pdfIn PDF document text
    • http://mowedesidafog.epizy.com/lumagojivulavesa.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_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 5320 bytes
SHA-256: 2430b5abcb7644dd9d4bd91539f249f0e2bc0156a01e08090c5a1cf4c3fac5fa
font_01_sfnt_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 11308 bytes
SHA-256: 8469c78d3f006bc1eb40475a1a0947ffd792149dac09b634c7707a8b2e34fc44