Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cab2a6db127df61…

MALICIOUS

PDF

81.2 KB Created: 2021-07-09 00:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f2bac3dd63bd1eaaef4c5302f30515bf SHA-1: c99269ae30d1db656a98016da73048a45aac64a9 SHA-256: 8cab2a6db127df61a3d4ebdb9d21565c2324bb392ea072e51296a39bcbf86bb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to external websites, many of which are hosted on disposable domains or compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://synerhu.ru/uplcv?utm_term=zx7+service+manual PDF link annotation
    • https://roweryelectra.eu/app/webroot/uploads/file/16226219834025.pdfIn PDF document text
    • http://sun-eko.eu/files/file/tusidobewonotarewetep.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/tewokusa.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/rodiwixub.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/lilezomuzuvufeba.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/70878941424.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609673f1c8bde---kumaxex.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/71920304067.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7eac30a9636e2c4f0d80b12dcbfa73c5/nuwidopoverezixisa.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/zogefomesimorif.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb8e4d78a7---93672684742.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a821991c3---fogerexavewoli.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/90566557311.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4pkgbbpea1gii8aplg5jak3k8b/zapepagopa.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/56210317278.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbb6e9cb5f---xefejabemuzope.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/sowugemotuwiko.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/k1hdhn3alr6gp12t9r676vo1s6/pinanamosoxezevej.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1fbe457ea53fe2daaf838c7680ef1cdc/53609739387.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/28671843493.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/jcj0mrj2cp6etcv4hn7egi1425/bijedazurufejabowasagu.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160991ec83d434---83630982482.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/4022007127.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757396e41f4---kulelugi.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/370f65ca5608b41ddd209f71d2b9d385/momufonitas.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/33920940588.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b3610e79---zidilufigetopadafale.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_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 17388 bytes
SHA-256: e069d420fa9985755e434b3fb487cb14c75c1bd3b43fef94474db4e72e5416a8
font_01_sfnt_off000107c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 10456 bytes
SHA-256: 6ff6b84963e2831d882cbd574c6566dde605c5168a3039bfcbc8d9af31244e3e
font_02_sfnt_off00011f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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