Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad652a754c58f95f…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 22:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6d606b8eff309837fd0cbba879c056f SHA-1: 348c0ec9660b320c150b1e250f81119c69d2a0e1 SHA-256: ad652a754c58f95f03aa9fa1377b29c7198f27bd5bea39f3a779e6403359b48d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=screen+off+android PDF link annotation
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/28237782774.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/25731125063.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/0bf08ab457ac0716633e213a9fc25432/jizejesoj.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/566k9r1s69eu0ucavaur959k00/wozabuvilikizemesen.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929d9d49cfd---kowopogerorebi.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/vivetenurexuziwizuwo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078525f7b912---buvagavesurugexapo.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/361b4c70cc2a3088be996f0171888a11/75961120380.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/63476558156.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e62f998afbe778225ed18de40f85ea7d/886975667.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/lejaxesozizukubukajoj.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/sexomevolafobinejaxo.pdfIn PDF document text
    • https://carlojans.com/cms/file/16554942727.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/lifitapisiweja.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/30721594289.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/ghnsk2jh93ee6v0cj6f8rqma56/43854668001.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/iq7e4e4uaclgsrlrhcjme4fvq5/pawaxazanaz.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fuzigiwimafateluni.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7218c544f24cd847df12933cdf259397/fefonu.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/33360415644.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ee45e8e85b2c73a4dc3836a7b5e6ad4a/82217211020.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f4ea7dfa3bcd289252d81b48dca430fa/76816617130.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607962bc4220e---53058505694.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/laxatisakofepazixo.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_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 17736 bytes
SHA-256: ef39ab719c5a6f10630c3792f3ee8cb2c5c09e0789272a965b41967463e1cf5c
font_01_sfnt_off00011c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 10232 bytes
SHA-256: 6915d641156c2cbd835ca5706957a9b96cfe310ed048f6b78cc9deb3d28e66ec
font_02_sfnt_off00013317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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