Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da8891589f01abc…

MALICIOUS

PDF

100.1 KB Created: 2021-06-28 03:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b79191a385517fca549c9407176fec93 SHA-1: b1f6ced3b4e49d3a23d273dd22ea149317cad619 SHA-256: 9da8891589f01abcf1aafbaeb18224633710ffd79d7027cbba934a3166fe91dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. Although no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 6

  • 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.
  • 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://cuacongtrinh.vn/upload/files/xoziwekabupefuzusaba.pdf In PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/1sik7gvbououv1eh7vvbmcepkl/39133200440.pdfIn PDF document text
    • https://kede.org/userfiles/file/setuwex.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/41153668504.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/f7fe0cec8d4ca5ecd8adb162de7bda48/67890880779.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/16147682544.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/gusuberulumubufaxamober.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c42b1c6d3---xuvube.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa851db3088---72545426345.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/nt85lai9dfp6mfj7hrspt5pcp4/47835617484.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/jetenunoviwudenadijevona.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/94682309078.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9dd6e35432bd231e58f2cef5880cfd06/giwarud.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9a47536ff---sipakox.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/janakovukakedubizagaf.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/55775157529.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4289447c55---90382971449.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/743cfec8c4075df4b0465bde19967e61/94813103473.pdfIn PDF document text
    • http://askort.pl/Upload/file/14221140780.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/43296492523.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c47354565---dewitavisuviwa.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/c15541a1bc57b2a5f8fb4c69ff6df929/nituwubulakupabewiwimez.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/246ac4d2c3455c23fcb6671ddeb32ba6/punevozurosidem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=champion+watches+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A59 10756 bytes
SHA-256: 3ffe05eb04e2938d60461016fbc8bf48f3cc93964848ee0accc3fab80f9fa30a
font_02_sfnt_off000142f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F9 2728 bytes
SHA-256: d51a735dd9f24aba00bc2edd71f8d9429cf75b63558a262dd407f0b199495049
font_03_sfnt_off00014e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E42 21584 bytes
SHA-256: f0a3b8e2b713ea1b33fe3a003267ebf89d4cdbfcb6017be7edc5d68ec6cedb60

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