Malicious PDF — malware analysis report

Static analysis result for SHA-256 679dbc8517d67dc1…

MALICIOUS

PDF

111.3 KB Created: 2021-07-09 11:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4397b28c3df43e4455479546fa53c4cc SHA-1: 9bfd1874427ee10e249b9e54366deeb3d3093ba7 SHA-256: 679dbc8517d67dc1ec8b1db36d69f0aa77dec2eeab25524c17d3119581ae6bf9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The document functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting other PDF files. These linked PDFs are likely part of a phishing campaign or a malware distribution chain, aiming to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://an-professional.ru/img/files/file/tegitekuvetanepomeligazez.pdf In PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad66d74063---53857853989.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c331856b973---lobore.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9497cdf7d7---86509944979.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/44862062208.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732cfd697b8---bixopuroratetefelo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/de02d2ba23b46f132ecfd1f6459392f0/32693866801.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca29771e3f---38532115060.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/0f9953427364c8d1d7b95107da55f933/99562317004.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/tofotasetojav.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/86587931861.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e1cb5ea4dc4---20748244217.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0785c46a14---26803349095.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/rarapojonexasitebu.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/50323487722.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88115fccb---87093180440.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4bb29bf88492b8343c7039dbd55097f3/kalavereduvusoluxijadim.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/28730634861.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e338703cf---lomizevelobedifefonalilud.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e4c2743c5---duganomuserunez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=properties+of+all+types+of+quadrilateralsPDF 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_off0001314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314F 10748 bytes
SHA-256: 1f92a3384c2130bea78454e7c50307c0a74d91056e822b3bdceb98f9ce575cb8
font_01_sfnt_off000149f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F2 16220 bytes
SHA-256: 6489e646d18458765199a57be55f1b03d5d70d63443aaaa6399edf5f717c03ae
font_02_sfnt_off00015faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FAA 20932 bytes
SHA-256: 1ef0566fd97a1a5a80b5b3b891ac79625a38fd0dea4b84033653584ea64b7e86
font_03_sfnt_off0001978c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1978C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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