Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77e0f49323bf407…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 11:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 948b2d9b7a816f437d93d66d10f31a9b SHA-1: 9b6c26d7701b712e17e7a9723d59ab859099fa67 SHA-256: c77e0f49323bf4074c33f8d022cd60e4f722e439156fbc425f00c544c4f66163
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable hosting, suggesting a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=sims+4+mobile+unlimited+money PDF link annotation
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a8dbb778---vexifuzexudoreve.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb214aa39---31670360538.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a300049a1---60708474152.pdfIn PDF document text
    • http://markone-tools.com/upload/files/gimajezopuzuto.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/73788499547.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/32403271514.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/71162972625.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41ea7b21d---86281847227.pdfIn PDF document text
    • https://banghenails.com/upload/file/nodege.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/62311430789.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0431392ca---bodopubomaborinavetutovun.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/080f7590dc6cb0edb2c2a5a87d0ce9f1/4377439544.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609455ded3acc---12164281063.pdfIn PDF document text
    • http://belst.by/upload/file/linasukiwufilopo.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/25267017322.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d4acb4031---62946642676.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6368a27c61---pewusozojefo.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/fegunewekixozul.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8du9vblh6mbftorv398nlrdq03/22188473779.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/jopuduwusofozedusob.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/dodudegexavozafov.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/50nqvb6ssjh83dp1cud52eaojr/5068530308.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/9839805149.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/sakaf.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/mudodivixelar.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_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 17636 bytes
SHA-256: 7f9c48c81f871ffe6792953754cb18f0d72eb6b50a5c31d984ef70aee629b946
font_01_sfnt_off00011ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 10656 bytes
SHA-256: f5d37df394269c3c605ea2815aed4798138dc35c4214e86c198c96bf581e4264
font_02_sfnt_off00013352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1