Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ab607df82fd36e…

MALICIOUS

PDF

91.9 KB Created: 2021-07-04 14:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e9722c831c6f70e78812c2369816935b SHA-1: 3a5b0e5488faba5866072da94f5439f001d85675 SHA-256: 20ab607df82fd36e7d2e177c95dff72dec676feae04a1e8804f6884e938a9dea
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics suggest this is a phishing or malicious PDF, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The presence of multiple external links and the nature of the hosting suggest an attempt to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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 http://execdentalclinic.com/uploads/ckfinder/userfiles/files/39905569095.pdf In PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7949c394---totimefaloxuka.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/kewoduwom.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea6f96414---34861819673.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/82238416883.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/4f6663ca1172ec36cbf5910629e76e32/jogomesowatifirub.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607244f94973d---gilusapapunoxi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cde86db0---41193668368.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/6261287478.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/b76903bbec40e37cd1d485af8a098add/93360576001.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff32e56b5a---sapizuxoxitedegariwogik.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/70650014008.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/da1b2e012b48bf559844630adb15d5e4/vavimajewowulixaza.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3hbl3369mq0rvgu6ig4mtq3gin/femune.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a42b5b4e7384fd94ddd8aa8cb88f542b/fasosa.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/17915133536.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1p7a0mmmvk6ved107qs5o2o0sq/34485052178.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a1f2bd9760e9944bf2dacb963afb3caf/tujivasijopunopotubevizis.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/zogexidodizuba.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093f623b82c2---87890672506.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/sulegabomarujetipevofubo.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/nrgicn8vba5ap33d7br8epcoe1/55343102070.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/vawipugulovodimazikiziso.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/59588605938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lana+del+rey+love+you+till+the+end+of+timePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/686af6b406f1d96c30faf6355ba7d937/82982716529.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 2044 bytes
SHA-256: 0402e3441bb377adb2b53225b5c6f0ee5ff5e074169f44228b7e72043111e914
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 17132 bytes
SHA-256: 792dfe146c7f347953da98487ff177a2b774a57e5d9fe6d5117cb8c56c17567b
font_02_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13180 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_04_sfnt_off000146fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FA 10688 bytes
SHA-256: cb733dc04cdb5d01a7e79976d6b8f866648443f951f0b6659d804701b488de20

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