Malicious PDF — malware analysis report

Static analysis result for SHA-256 36efae9aebe43189…

MALICIOUS

PDF

98.1 KB Created: 2021-07-06 19:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9c47c95c10d6d62c0cf47a0a2fccbc3f SHA-1: 382d831feb9f4f5b443f40c6b578cbd2e3ff990a SHA-256: 36efae9aebe43189820ba653792ba38e8e66d0b94ed747904c288f2d2b9ffeb2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The heuristics indicate the PDF functions as a link farm, directing users to numerous external URLs, some hosted on compromised CMS platforms. The presence of multiple external URIs and link farms suggests an attempt to redirect users to phishing sites or download further malicious 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://garglob.ru/uplcv?utm_term=indirect+variation+graph PDF link annotation
    • https://jordanadams.com/ckfinder/userfiles/files/jajiwurixi.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/c44d9562677de7f3443e46ab2c4eca2e/nurilefitajo.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/67141947765.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ai0n1b5d93b1p16mqnev8fnvf3/wowuwedulegoludixejumi.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/lurazurabejatufedi.pdfIn PDF document text
    • http://planetamama.ru/files/file/14189330820.pdfIn PDF document text
    • http://szwygs.com/upload/58027881714.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd764dc6c5---89676006758.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f99e9f8f8---jomiwepedotowepebelos.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/navomosabifefot.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3377a4ae47---822413086.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98c08137f1---90182693719.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/fikigotejisesosejunefuwin.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/82634529228.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/10b4677d376f2e7806bf0a32b3258f76/tovapusowologu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/88177700678.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107010234476368.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072b08b1b734---18983914761.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea1484e84---nijebonusuvupokuvugo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1c651f15d34ae3f2e8a851dddb9964bb/47235590042.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210502003801_1374618276.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a783a827bd8---78089248035.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/buwomawogisejugifuvuwof.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_off00011b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13353 10596 bytes
SHA-256: 21832df364f1fc2e79cd5125d18c7675d48a24cb97c5128c4fb01589457330f4
font_02_sfnt_off00014b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3A 17656 bytes
SHA-256: f179a7ee290e47a5f2340392f74ce3784c1d534560fdbb8ad7b408666d7195f9

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