Malicious PDF — malware analysis report

Static analysis result for SHA-256 809377e4ccc96c13…

MALICIOUS

PDF

80.9 KB Created: 2021-02-18 09:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8fe21f4841960a5996bd875ca6904a5 SHA-1: 49c5ab433b9ed4e5721a25bbb342158687311b21 SHA-256: 809377e4ccc96c13396ac0d259765316ee5e540189d7949ab60774bfc019bf2f
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malicious content delivery mechanism. The file contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection strategy. The embedded URLs and the heuristic firings strongly indicate an attempt to lure users to malicious content, potentially for further exploitation or credential harvesting.

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.
  • 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
  • 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://baarspo.ru/wix?keyword=volver+con+ella+pdf+online+gratis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff64cea43023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5fef9db95fb64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fcddebb174f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_5fe46da79998e.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/xobesulozuposavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_601e10db698cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_6004ff234746a.pdfIn PDF document text
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/409229de9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452376/normal_5ff8c6653aaf0.pdfIn PDF document text
    • https://cdn.sqhk.co/xenekifa/ibjaogd/f1_schedule_2016_japan_espn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fe1b5c439fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_60151230a796a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fddf80bc8ae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426696/normal_5fcefbb8b1559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5fd3cef8b2fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fd9edd119573.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/7436eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5ff0403ad5ae6.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/rhgugdM/baby_names_with_meanings_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fee2cb8bae97.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/jjjabK4/29287463770.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
    • 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_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 5348 bytes
SHA-256: 8fa716edddc48ebd3bddf849ae44304d7489e522a68689177355994bedf8b350
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 12512 bytes
SHA-256: 06d5c8019b25663c9b35ef4737bc31854378e2247c1a413a53916851b590242d
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16068 bytes
SHA-256: b1615e29a4fe6c7320d553a30418b4fece26933a192be804fa4a6c1955e67a67