Malicious PDF — malware analysis report

Static analysis result for SHA-256 682f285ee222b09a…

MALICIOUS

PDF

88.7 KB Created: 2021-07-01 19:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6e73a2696378aa2712b05a1dd1a57e0a SHA-1: efbf52b446eb1d2a82771b446944ad97cb323645 SHA-256: 682f285ee222b09a6f86d6ccef49b8e4e6637ff64064d6360c223ee67e49af00
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. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites hosting other PDF files. This suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d6dbefbc4---93258636184.pdf In PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0abae766b0a3d9255731b08f09537cc8/64071534098.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/tozudaroru.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/37508977745.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/34064013323.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c1pg8ubg89p1mdh3orjt5glk5d/vedoki.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/k2r2mp5ms7phvai03is7a009pe/zukofojul.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160796ec7126d1---zalijawarobamijuw.pdfIn PDF document text
    • http://redactron.com/userfiles/file/11256868149.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/47898475175.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qut4059e6hd59ou3o6vbenhphg/lokujazovexirovarewoti.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/45038047504.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/cfda004c32d439aaf1cead57b97bbbea/92762469307.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/61560145809.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/86139500909.pdfIn PDF document text
    • https://airbays.com/userfiles/file/xilefazofoxerar.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/lekigimuta.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5555a2a50---kegisis.pdfIn PDF document text
    • http://wych123.com/upload/files/lazojigavojijeditaf.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09346bbb7f---jorolevamus.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/weduloganafokonos.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/61e6a0a5c5fb4e3c107cb8a436419901/vokavefoxisezijuzenude.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/81257610843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=collections+close+reader+student+edition+grade+8+pdfPDF link annotation
    • 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_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 11132 bytes
SHA-256: 8e30a10df3516a0162a9b291717968083aefcdb2e1fe151b7eaa8803ebd0213c
font_02_sfnt_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 18112 bytes
SHA-256: 50d763b240c4eaebb4171ef99b38786d9fb578989b04b637a7e720da9d3f6f06

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