Malicious PDF — malware analysis report

Static analysis result for SHA-256 541087757f3baca2…

MALICIOUS

PDF

68.1 KB Created: 2021-03-14 17:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e86355a314307c3e6456247252ca9cfe SHA-1: 1850d30985b367ab0b32f23e30cbe855cf9e7d23 SHA-256: 541087757f3baca257296096075d1f63274db205e191995b35426e8d8eb7fd37
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirector strategy to distribute further malicious content. The document body, though heavily obfuscated, appears to be related to insulation materials, likely serving as a lure for the SEO-based redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/award?keyword=thermal+and+sound+insulation+materials+pdf PDF link annotation
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/1304657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5fe2b8a6f118c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_602141dbd896c.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/ronijanowuzexajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5fcc5382436ea.pdfIn PDF document text
    • http://wukezodunoj.22web.org/bionaire_oscillating_ceramic_tower_heater.pdfIn PDF document text
    • http://hesap-al-sat.com/lisan_ul_quran_malayalam_guide_7w89ks.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/moziwifopev.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/80462873397.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/a_que_edad_se_puede_empezar_a_tomar_colageno.pdfIn PDF document text
    • http://naturaleone.space/786646730086zf04.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/6577702206.pdfIn PDF document text
    • http://hocostyle.ru/jazutu24cgj.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/age_of_empires_ii_the_forgotten.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454055/normal_5ffb420ba624d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60423498b2af7.pdfIn PDF document text
    • http://guwelureg.22web.org/zekanokesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fdd2bf39333a.pdfIn PDF document text
    • https://mejojesakawevud.weebly.com/uploads/1/3/1/4/131438193/bogefifixebef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5228 bytes
SHA-256: f1b07ce5393b3ff4d5f50e1d4ec46eee480ef76eae868426a9315657913f44fd

Open this report in the interactive analyzer, or submit your own file for analysis.