Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbb2851e62be384…

MALICIOUS

PDF

124.3 KB Created: 2021-06-26 19:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6d992cc4fe70af849aa3bbfe9266473e SHA-1: 7084b8b1a1b8494765fffae068c6bbc915423f21 SHA-256: 1fbb2851e62be3844746fecbafd32b765d19feadda7df8bbc75f517226550039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely lead to phishing or malware distribution pages, aiming to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://queure.ru/uplcv?utm_term=distillation+equipment+and+processes+pdf PDF link annotation
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/57338675a773a8f1130dec9def57da13/17384611599.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/pegip.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f39b84ec71a6b0367fcbc74ac57806a5/supubulifinal.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/96d2fe3798ff983e96beed793b504af6/14435371619.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/sa43fmlg96h7ue1ob6ch5odthu/52618196315.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a810c400---69948169558.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2da3260529---rotuwarosuwo.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607724d2bfdee---rixeso.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c0f9190c1---kofejija.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb7007039---83345223553.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10ee975b39---wapidomuberoxifoni.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210613000809794.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e380c74ca8221effbebefaf666867f5d/vefapawinivalalukubak.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/54gc2kji43sm7tgbcduntns0c1/tezagipifizi.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/fefisevemifibaxemix.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/gijezaluvazowebajuvok.pdfIn PDF document text
    • https://icbacademy.com/upload/files/20041602599.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/g5kkrnjsbakb4fc3o4gibum5t3/likugopodebikovujivovesa.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec19eb6982---788054154.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///19714041494.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f511f6b3a6ca64de87e6a2813ca8e0e7/jegekaxijiganenafevimaxu.pdfIn PDF document text
    • https://ecoretras.com/file/20570116514.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d20358b61---15218252773.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_off00017aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AED 21708 bytes
SHA-256: f1da16a901074c555ce73b398b6d2913048d2efcb60670307fb7b866814d6b2e
font_01_sfnt_off0001b23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B23C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA53 11028 bytes
SHA-256: d9006aa62057035108a4ff6d4c567547afd7f5abde82e35bd65b1f49932d08fd

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