Malicious PDF — malware analysis report

Static analysis result for SHA-256 87730eb41122dc48…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 00:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 619d58ba35252a2464a6242e5fdf82fa SHA-1: 565f70d84a17c4fd82c2f003e1950b5ef869856b SHA-256: 87730eb41122dc4882dcd9401705b04ca54a7352286ec42092f47891fa6d1fe2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to multiple distinct hosts. The embedded JavaScript likely facilitates malicious actions, such as downloading further payloads or redirecting the user. The numerous URLs, many hosted on compromised CMS upload directories, suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=save+wizard+for+ps4+max+license+key+free PDF link annotation
    • http://agcslohian.com/userfiles/file/85496186841.pdfIn PDF document text
    • http://getem.pl/files/file/57425780888.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2ce03bab255642505ef8d688c4f0cf05/87328944371.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c6fc6e232---xadovarorudozefidet.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/cecm8uic7h6ou8svl5oid8pth4/seripapox.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/jofaxomibitovuzezamoge.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0477bbf26---76714849187.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c4ed870c5---7748735427.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087aec4976fe---40675072532.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ajuni3efonr79olm625it81f7m/divajuz.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/b0b370922f37515cb0a5a8d811bf4812/dubisidejuzopomidazoki.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/dupokasit.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/72697885028.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907113052bc---82202079893.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6302d6c032daad24b29abd04e376a359/92869877384.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdc96424eb---23723808213.pdfIn PDF document text
    • https://goldenapp.net/file/suxifolazo.pdfIn PDF document text
    • https://ancoraeducacion.com/images/xepijegemegexetosaxu.pdfIn PDF document text
    • https://arerp.kr/data/file///bisobidi.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/9d98858307ffb70bbe552ade798bf52d/30588457652.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/wunokalivezuvogowusuk.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/puwusidolipudes.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/93826982689.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 17460 bytes
SHA-256: 538252ab54aabb27f5ffbfa50e5cf0af00da9b990a802d72a2714653172735f5
font_01_sfnt_off00011baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAA 11356 bytes
SHA-256: f3c06927c86db05f094546d37590e5b7669854e7e9e0eb50b5061b390b3a4ad8
font_02_sfnt_off00013686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13686 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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