Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8d7c11a44f3ffa…

MALICIOUS

PDF

74.2 KB Created: 2021-10-04 22:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 55fb97dcba56a1d30bdd322cc4ee5a42 SHA-1: 554aa98b9b4f8db983ef252278e0bd74e0f3489b SHA-256: df8d7c11a44f3ffab5a123d7bd0b1c81a50fcfef9be412a3d9ce214c6deb564b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=algebra+and+trigonometry+functions+and+applications+answers PDF link annotation
    • https://etcbt.com/userfiles/file/zikepobomapaxi.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/5533485569.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/56907013918.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/9597571b9d95b495d843e5b31f65833f/57969409844.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/66576995190.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e944ced6283b65fcf5e3e0bdb5531c2/regutuvinobasojesevisijo.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/vapifutozebopapotomap.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/96087414455.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/domebafalazajudi.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/24685481634.pdfIn PDF document text
    • http://btfa.tw/upload/files/pofafosegawepip.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/10288090558.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73561112858.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/20185582042.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/39663205554.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/nazakugariruri.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/20549219057.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/23713875140.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/jaxewevi.pdfIn PDF document text
    • https://tl-systems.hu/files/files/46368136861.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/nelekamifog.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/totumureguwasak.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/61826049403.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/16270083470.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/50013076036.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_off0000b8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 11384 bytes
SHA-256: 517e605c300dc71a0987a52acfc26340cb5347335db5f5ebdbdc2f42bc6a6807
font_02_sfnt_off0000eb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 17564 bytes
SHA-256: 98fa0bcc8daf7e346440ce083ace71796c789d3e4844bd030ab8c04634b91afc