Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7acfa447e613161…

MALICIOUS

PDF

100.0 KB Created: 2021-06-26 08:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1f9c3e15eee7dc74ea9afccb8e9fbc82 SHA-1: 791b62d4235a6119d25da2c141fdcef14ed2def9 SHA-256: f7acfa447e61316109cb65e7c7bb0f83a390e77b184d854f2e6a9d6759d5a924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the extensive link farm suggests an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://synerhu.ru/uplcv?utm_term=orion+512+manual PDF link annotation
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c52357cf421---90811618241.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/gemamepagom.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cc01ec2d---gojuwixiwirosodavu.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/tolodatizos.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/vapifilajuwiw.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/q2jt1n7qm9sjocnbmc6hnjmge0/45844717973.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607880656016d---40155671027.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3f129b0d7---38205626813.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3724b3d80---movagixufipugewode.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a521ac81d03---weliwusedivi.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/jivibigoberozewowoxotibiv.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c39e185a---pavuluv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 19260 bytes
SHA-256: afcc58805a6e7559441029ea725283c3b3e88648d132631a45633d4553c60e98
font_01_sfnt_off00013cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDB 16872 bytes
SHA-256: 3b3875d2650628d0de0269c987b40e07b8cdecb9dc413d04a6735f04e3302c5b
font_02_sfnt_off00015443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15443 10304 bytes
SHA-256: 369ebd785d8b253e1a594b7041acdb597d8a81a4709cc665f89aa05ada9f6fc3
font_03_sfnt_off00016b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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