Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c281f27a612c6…

MALICIOUS

PDF

121.9 KB Created: 2022-04-09 14:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: a35440ccd49d3f7c00b9671513b08b8e SHA-1: 51e19e953b4e3ec0fa15be6d66e2d3f30fb57767 SHA-256: 445c281f27a612c6c3117d30a28869afef549d7e41984fcd39c8350d5a20af2d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or phishing lure. Heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the classification. The primary attack pattern involves directing users to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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://loheb.co.za/YmrXLWy8?keyword=what%20are%20the%20stages%20of%20scientific%20revolution%20in%20mesoamerica PDF link annotation
    • https://gifezimudafero.weebly.com/uploads/1/3/4/3/134312010/7935850.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/gomiba.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/998360.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/lexapesekomonem.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/69623573504.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/9837230.pdfIn PDF document text
    • https://avela.md/userfiles/file/25016289266.pdfIn PDF document text
    • https://qkon.ca/images/file/34697890874.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/nofalozezi_kafosoxij_pekijala_wotefuzar.pdfIn PDF document text
    • https://pexikonafan.weebly.com/uploads/1/3/4/3/134351575/45a55b4.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/latikegilefuda_zetepasejim_kubifojoju_vapawem.pdfIn PDF document text
    • https://pawirijox.weebly.com/uploads/1/3/4/7/134701745/logapisezibegejavow.pdfIn PDF document text
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/9f17e39a249.pdfIn PDF document text
    • https://livozuduk.weebly.com/uploads/1/3/4/5/134583284/kaluze.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/04aaac.pdfIn PDF document text
    • http://candientushinko.com/images/file/xazerubisoxe.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/vavikugan.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/86644648787.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/bobukadodavufolusidu.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/3095462.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/dejexijasurusa.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://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_off00017a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A00 17612 bytes
SHA-256: 026802154bd3554406bb1333e6e0adb364b4fb332200dd0fa2ddc69720e4d72b
font_01_sfnt_off0001a75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A75D 10940 bytes
SHA-256: 040efd21c4f9762f44993cc30fd76b9d58326f6d2215f825fc19dd9103c83742
font_02_sfnt_off0001c098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1