Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7702bb64a828763…

MALICIOUS

PDF

78.1 KB Created: 2021-06-29 09:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 63327f14594db81c12a71203c8587ee4 SHA-1: 03735f79cac6c9b7c3f6930fc1afd3d9c50badf3 SHA-256: d7702bb64a828763c857edbb8bd4f057388c50119cf1cd65668acc1c1308d7ed
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=selling+inherited+land PDF link annotation
    • http://fanti-fitness.pl/uploads/assets/file/sukutebutawezewisibuvezuv.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4a9049e5a---rewujopamefovinazufobe.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/tafofarun.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ed0e846897d73161467ad201db388819/wiritowisaguxozute.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lslvlbo53krnh8l1asmvf1ld7i/77657176370.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60cd3aad897e0.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fece209d19---pupetowaxana.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/1m06470o3cfgc253dfrrvuors2/mujadagor.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/zodupatekupawado.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/3878f95e2ce3de1c1a5d1ce33b929441/beridovivibumusijov.pdfIn PDF document text
    • http://zxsolar.com/d/files/tibasibofaxatisidapo.pdfIn PDF document text
    • https://anfauglir.com/images/file/sevebifono.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/wakavezufoxulibabu.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ceg2c0n285vgm78kjpu3jsk6l9/85510106482.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/5052574563.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/2fv0p8isn7nfafm2rprbdo3cq2/lufipediv.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/melijunik.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098641ac4b6c---tavekizimoxa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84c4574793---65407198500.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d1727c84616351bf8d563b1e6133a41d/tugetubafurisigose.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/dekovidisutenanuvidusive.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16077e2abaf94b---73090273428.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b0664a6f1---nerimolexozosurun.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8e4c407d09ad97cbeb689a2b6f95f77a/3294676550.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 10312 bytes
SHA-256: 907cf86501ad1fff678fafe2dd91b617e152450604f44424a0ac21148d6fa8fe