Malicious PDF — malware analysis report

Static analysis result for SHA-256 a785df82bccabcff…

MALICIOUS

PDF

189.4 KB Created: 2021-07-03 07:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6ec969ef9cc179db3d9b2a74d2c1b22 SHA-1: c7e881eff2a49edc761744ca2166aa62be18bd37 SHA-256: a785df82bccabcffa88030a95f905b23c0db7064eb9343d787a5323aba09838a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the PDF being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://0930actress.com/files/files/vobopiwuf.pdf In PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6ff6a7e3b---52465197836.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/9f04bd8e4371bf25a287acb043e1156a/91005189303.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/karapegumimabolol.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/89867509002.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/410329607.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e2483dfb4---savozupaxilikezabukiwiw.pdfIn PDF document text
    • https://daismene.it/file/82412732533.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/dekovurawoma.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ce064cb5e32d19ef9481e8f808c92454/gimigefenedanuruziraged.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e82d048942---57023686709.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608405fbc3742---79983971311.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/0c93a508d9b1debfbf3965e102e60dc8/12452201147.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2f37bbc43---xirosujuzudegitajojoserug.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/3e3ce1708856b84cb92f2d500fa381da/9069965695.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/woraban.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/ljenule1927bqirob63tqtir2i/581670609.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/tolepozozogebidi.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/2f3ee0cf5eaf515cc5b408aa4a87849c/mikewikojabagure.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/f67dj42q86blurp4n461cj9q6n/18442312243.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/fiverejulimipunow.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa256a079c1---7532838414.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/vixawuwaxasinim.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078219482cdc---jovatofoxetuk.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/63876219201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=but+the+free+gift+of+godPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000272ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00028b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28B01 34184 bytes
SHA-256: 1bde47bbf144de30953b725ba71a8b95f7c5f5088b3d5f9180c6f5870747fab1
font_02_sfnt_off0002d12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D12D 10304 bytes
SHA-256: 754c735de15fc4add3cd55ebe188fdd3b2e3ed7036cb209c5d9aecc6c18c9cee