Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1c839ce5a05e0b…

MALICIOUS

PDF

84.5 KB Created: 2021-06-25 19:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3ba161543dbbbcb5713f2fd5695d9a7a SHA-1: f195a74b546e66d7f9d9dc52c54361820c8e746d SHA-256: fa1c839ce5a05e0bc00178648a9fc7f2cd89fcd59662eb6cd02039b542e8b878
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://oniceh.ru/uplcv?utm_term=sathrapathi+songs+download PDF link annotation
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8408929575---91878673243.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e285caf90e2f96492dea216c59a21d14/jafijirazokegejelusega.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/6f8f97863b604979ddeb841988cb83a0/piporemepukaka.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e50669ffb5cae7bb4afe812d3309a53e/girenowizivum.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210602213454.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/pesuxafiwafaju.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/95062631444.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e522b5ce5---11025475432.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/80384fde319e3eb6b98cfcb4c07a6b97/12711359047.pdfIn PDF document text
    • http://daydala.com/userfiles/file/tixamoju.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3ef6ed156a06784e6513a7a9638f7d20/jidiwaxerokove.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47cd84c91---titivabifalimelerasak.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/10607b7266fffb2ef64ba0dd9f801763/47353863756.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd10ba2adb---xabejederizawosel.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/48494961289.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0e5904a6---dopatikavagi.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/koxajozibog.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608745852bc8d---85975623155.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/fj7si3nk7k4ofj5aas0dim5ol2/21725168065.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a87067df815---49190882561.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/66057325aa9f85523ae18d59dfbb3c36/zibowexidatoserotike.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/tizuwelizepakamif.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f289e1f7d8a3d24d3c99b8313ceb9953/45720988416.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a26517acca6---61489907360.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7f4fab4de---38573276474.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/60357459247.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/vunudasopebotoga.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_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4E 18712 bytes
SHA-256: df5296dbff162bead5da7d3e978d2442f61a347a657346689784b8887ba78c39
font_02_sfnt_off00012c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C35 10700 bytes
SHA-256: d5301ac554915ff7c6acdf1c1971d638b0d37f57a00c9b1a1581657afedf93ce

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