Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fb1ed4f839d3b3…

MALICIOUS

PDF

88.9 KB Created: 2021-07-03 06:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f801ea8347f24db332da9cf8493d75b8 SHA-1: d3ab709012430e8cafb8686b7f4948a9dc46c7b5 SHA-256: 80fb1ed4f839d3b3466b1f211d6c04e3407a88236528d3d0107ca7945fb07c27
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious download lure, likely using embedded JavaScript to facilitate the redirection or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=university+physics+young+and+freedman+14th+edition+solutions PDF link annotation
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/432c337185457365e7816bd7aec6fa67/loferuvikajadevutazej.pdfIn PDF document text
    • http://fedoro.ru/upload/file/97773519854.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/mosabazo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607877e24eb8d---77354601537.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ee71e1927---tivobipimapewokesobudan.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e9d3c774---42333142575.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6mc2f3l6urgq17doc3svtnerbc/pageriropurizeworejaxu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c82de46fb4---64837296076.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e405e84a3---39925356678.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/28945470831.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/f0dbhec72fuaeoac6a9r9ajbg4/75660637829.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/aea11vem7k8thjl1n6ba0bskn6/bafoxemameruvefubo.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/wemukajonuwosumob.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/94389566346.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0csaoi3rhkjiona1eot0h08lv0/lepapuvuviratitemi.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/588cafd1bcaafbd2cfe9d2efec7525fd/gidinonaxuzasoxivu.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/43645114004.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/rulejide.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/2765s71ki00v1k0lrku9bf6vdm/71441921537.pdfIn PDF document text
    • http://synowka.pl/galeria/file/97711056142.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/lamodewojo.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/porepowuputiso.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6pan92cg54g1737bvueuibcdo7/75610554955.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/12795316620.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_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 11484 bytes
SHA-256: f322ce5041d59d0b80a32fda6b86bd882527939ac0897a5e2ec6d2871d84cfb6
font_01_sfnt_off00010e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 17924 bytes
SHA-256: a20b229f405ff3e055d8a9cc1d39192a8af824f20df8f722fe3bd9d3b3f9b57e