Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2690809b319916…

MALICIOUS

PDF

91.0 KB Created: 2021-07-08 05:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62b4bc918a91589c6bfe50453de9258d SHA-1: ae5e6f1b500e1d111adf3cf0eebaab13d75d5df1 SHA-256: 1f2690809b31991623026081cadc8dddc4071238f9cb9f1855e648857dae543f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites and disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://coretry.ru/uplcv?utm_term=cayman+islands+extradition
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ut120gfri1orjbucsnik4j8id4/99109659513.pdf
    • https://evermoral.hk/upload/file/1624346037.pdf
    • http://arredamentoambienti.it/img/file/6009835228.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160751b3a20121---wotapusuferevuko.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3701ab1b4e---24344207543.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/rdhmgvhdvosdpusofrfnuv3i94/wupal.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160728c0e16a73---26625914547.pdf
    • http://www.vegagastro.pl/upload/file/69985420295.pdf
    • http://billedbutikken.dk/articlefiles/file/92435195363.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/7b6f91446fe0f8ffb7cb3ca41756673a/87399131868.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/21531632715.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/57d5038b3d10365edca63427e246b2b8/fofajifiwasopajikuvojixad.pdf
    • https://ahreco.com/uploads/news_file/3268226547.pdf
    • http://clearspace-design.com/CKEdit/upload/files/71139156002.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/afbfc3e533017c6ed22c191034ffc946/49318971449.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/puroifsh5f7889kpianagpcrdi/mapagarixosisuxukaju.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/67422367068d88cbb7b3825418c99dff/39604019632.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/q7pjoin467mn4ksv8sudfn07up/55329537422.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vjaggts67ilr5bbie9helsjtsl/66472857569.pdf
    • http://kaupa.cz/userfiles/file/sorodupexatijawupetenuver.pdf
    • http://tai-group.com/upload/files/97749768992.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609095cdeaf71---kurijizenigojibesupota.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/7445f820f2a40fb97d100afde27a7a49/leguwitamoxudipoku.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/xomazuwiduxoxerutox.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/evb8d7ajl4323pun2c2ka52rm7/warotadotimifupiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000fdf4.bin
f24569b2290d8cd211d79ae15790a4017e6742d135e31135dc288a3ce4a7b393
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFDF4 10656 bytes
font_01_sfnt_off0001165d.bin
2c4fab616b6a2dbfea284e9ad0b33e0d8d5f93a3b5704f4d43741cd0ceaf7af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 18284 bytes
font_02_sfnt_off000146a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x146A5 16792 bytes