Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca625203f0b375c…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 06:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa0622fa0e12a76917d0460c519f80ac SHA-1: 390f6ac545b6947398a389d248b28687211359e8 SHA-256: 3ca625203f0b375c0a56452cc9dcd9bdd526368cf3d8a1fd948c7b44872f9dd8
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized URLs, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly indicate this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to classify this as a phishing lure, likely delivered as a spearphishing attachment.

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.
  • 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://druttle.ru/wix?keyword=harry+potter+4+pdf+archive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378153/normal_6006d40117149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5ff781f287a9f.pdfIn PDF document text
    • http://soldonlakewood.com/features_of_a_newspaper_worksheetljawf.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/fUwsjjR/63870949772.pdfIn PDF document text
    • http://greenbike.shop/cdc_handwashing_guidelines_2018ip0db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486190/normal_60098199defb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_600eecc2a9d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_6008b83a57b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5fc8adabefbf3.pdfIn PDF document text
    • http://asia.kiwi/nodulo_de_parotidanobqp.pdfIn PDF document text
    • https://dojunulopifo.weebly.com/uploads/1/3/4/4/134445836/1475282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fe671b08a87a.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/2mqgehc/image_editor_mac_default.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/hygdZgc/4_pic_1_word_5_letters_fire.pdfIn PDF document text
    • https://kolofajek.weebly.com/uploads/1/3/0/9/130969684/lusugorixuxu.pdfIn PDF document text
    • http://com-signto6.xyz/89822451813mhrz2.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/eyOjhgd/zombie_mob_sniper_3d_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473642/normal_5fe105ae35088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigilozixorod.epizy.com/data_retention_policy_template_gdpr.pdfIn PDF document text
    • http://watosoxugulufi.epizy.com/capitalism_free_full_game.pdfIn PDF document text
    • http://xilagerezob.epizy.com/wedding_invitation_cards_templates.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_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 5244 bytes
SHA-256: c33a8d87b6a5d4a72ed757d9b13060e3bbd3dea224bc9b01cdfaa58d3f88c23e
font_01_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 10508 bytes
SHA-256: 2a6a9193a5060f2b665dd3f60d782c8c519bf664b90429828c9a870f4b8137ac