Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f90bcf8edd25cd…

MALICIOUS

PDF

103.0 KB Created: 2021-06-26 06:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9a749a99f67e469a0c7bbd6a67e22ff6 SHA-1: 23411446aba45db608ba0106f776408ebdd587ce SHA-256: e5f90bcf8edd25cd921213950252bad5eba3dac865bbacc73148d0ab0daf7f32
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports an attack pattern focused on luring users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.mustwalge.ee/data/content/files/70641550763.pdf In PDF document text
    • http://builderall.info/userfiles/file/34448288214.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/tekanafokewovon.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9689ddb4c9---64773697146.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/bafemimafufe.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/nepobulite.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/numaloxepebopomagexosatul.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c5db0ea6ad817e694cafa8985f14024b/73397785143.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/00qgu6lr8p1f42fp9c2ses2ijr/turezefaropatotojoz.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2b01d5ff---xuganivo.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/4p5ujtu35d9lirc0pp9u1vu3h6/59056764432.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/359536453.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160723b27cc785---45615086404.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c6bdfb554d8cab3180958681bab34858/87500515102.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/vlntj6v01kqsmq6ekf4tq1s2v2/59283935052.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/13a1b7c9f547999c6916c5b67878c817/limiwopasotupovoxalobur.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/96ui7epuivjbirec0fqnc18k96/verep.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c058c1150bb---63033089853.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/dmtllnr24lfa07g29ij28c1va7/bagudoniparatena.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ab1dc6451---daguvawusofewajoxateg.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/gumirijir.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/55ebba1846a0af76cb63bb77e0de50a8/medesovedi.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/girasasibegurisal.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608113b9e7c76---lujerudoniselutob.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e231be48552138a7c5f8af3e76dd9eb1/47729529491.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/jitupipepugiveruzesenexe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e656542863---46574594824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=8+ball+pool+auto+win+mod+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000128db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x128DB 28816 bytes
SHA-256: 0af3aa03ad40f47e397128c89e65747ee4a4f13d27d5963289bd4f2f6fa57c78
font_00_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 20676 bytes
SHA-256: fa294533d39722eeba5358e91562e65f41315b8cbfd1f6fb0dd154732c53b7b2
font_02_sfnt_off00015c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3E 10588 bytes
SHA-256: 7cf9634c374c45a04e6f8b505ad83cef505f4914d91ec10fdd6e02439e3b75b5
font_03_sfnt_off0001742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1742C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1