Malicious PDF — malware analysis report

Static analysis result for SHA-256 f554164073c91405…

MALICIOUS

PDF

80.0 KB Created: 2021-06-28 00:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 79a4f046664fdf99dc42cb8597f17474 SHA-1: 968e7732d01a0d98abdc657c90cb85d1fc70b583 SHA-256: f554164073c91405e2a1ad5b2f7e6265516d0d9979a41009e8b04792079fc041
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely serving as a distribution point for phishing or malware. The presence of multiple links on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=god+gave+me+you+for+the+ups+and+downs+lyrics PDF link annotation
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/oo2rq0am2al2ad390roo1ev7lp/somafedanezaxewa.pdfIn PDF document text
    • http://cecev.com/stockages/files/81047187657.pdfIn PDF document text
    • http://riversedgefm.com/files/file/63458988776.pdfIn PDF document text
    • http://teplospectr.ru/images/files/61646416324.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/wubupugutefujetavurezuk.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f620e911b3e0b38b09ac03a6af85aca9/23048904947.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/24548854352.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/70041808172.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82b01527a---14887822278.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/4bae69e55a4805d4d10adaf5c0a5daee/banizozow.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609024dbe0cbb---17575784241.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/cg5svdu748uu0ogchtv2fpa12q/27098043554.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/99493405252.pdfIn PDF document text
    • http://dentherapia.hu/files/file/35509317875.pdfIn PDF document text
    • https://noddy.nu/images/file/12376558271.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210530_005735.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7d120cfc6---soril.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d6996ff90---minetomijale.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/38504992055.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/polinupawoni.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/pajukodovuf.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983b8e923a4---65662804690.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/45085303494.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b99060158e25d8f62073b02d920c23c/filefilijav.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_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 18232 bytes
SHA-256: 64def0f0ea7d0fc158e0883c59afe7063369b1216acc1d424697bfa3170deb36
font_01_sfnt_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001175d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175D 11472 bytes
SHA-256: e42770247f957e1e519d44e24878db0293f0b48e30f7e43e4461d8eb918c4f06

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