Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbb8e24301724b3…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 15:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6d4783ff23c474fed1f8704b14f32c1c SHA-1: d0a7641ad3435fb65c39881f1154f6bf5847ba28 SHA-256: 4fbb8e24301724b310879b0fc138410b3a5e4bfbd375870bd3dac9e83b2108b8
192 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, yafferge.ru. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or malware distribution attempt. The presence of multiple unknown URLs further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=the+heir+kiera+cass+wikipedia In PDF document text
    • http://wijasagasipode.getenjoyment.net/lg_soundbar_nb3530a_mounting_bracket.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/what_is_my_love_language_meaning.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/vasaxagodesanexego.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/99373889582.pdfIn PDF document text
    • http://penageli.getenjoyment.net/2021_lexus_es_350_lease_deals.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/golds_gym_stride_trainer_350i_elliptical_instruction_manual.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/boxakarobodago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_5fcddc4d176a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/75684495032.pdfIn PDF document text
    • http://jogalasevoron.epizy.com/teselerufepa.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/ferafasurigoritowutimoto.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/12676011712.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/gisegifivol.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/gariv.pdfIn PDF document text
    • http://vujofif.epizy.com/camp_x_ray_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/23966344970.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/the_crown_season_3_cast_queen_elizabeth.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 5232 bytes
SHA-256: 3bb0a0a75698020d47544fa1f4fe686866247bf4e5f5bf3a7423cc8775458439