Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f59f1ca9f7fde82…

MALICIOUS

PDF

73.5 KB Created: 2021-09-13 15:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0cc25b4f1b12f3678083989d039f2649 SHA-1: dd4cbc06d3e2326c5f0e030c951b88ff33dd29eb SHA-256: 0f59f1ca9f7fde825863ed17225861e793a764da7de0d0c39fac5b8956ed0f59
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting and are part of a link farm. This suggests the document is designed to redirect users to malicious content, likely a phishing page or a malware download. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://sicilalluminio.it/userfiles/files/79833948598.pdf In PDF document text
    • http://isdoor.ru/uploads/files/9219124692.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd6d3db101---48015568794.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/kigaf.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/kifigekubiv.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/satubidoruwewipudo.pdfIn PDF document text
    • http://schokofontaene.de/idata/42596076886.pdfIn PDF document text
    • http://mariancozma.com/_user/file/23994373794.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///pemonuregot.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea4c2532a3---silul.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/tozelenemuzob.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/gamibapuzapasalofevupid.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/4763762545.pdfIn PDF document text
    • http://skncn.com/u/files/20806328510.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/70560492369.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/letisiwunujutugakuder.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/ziwijuwesetofapi.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/43022323883.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/35967781134.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613be024badb3---52754287486.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/54194283290.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/4208912983.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/27917581345.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/dakipupukimekizir.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/22306704853.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210913080836.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/kobamuponi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=art+of+war+hack+mod+apk+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF27 10652 bytes
SHA-256: 062674252e9bd2941232650eb837164f02268f87da2dc5718f669a4e63f610f5
font_01_sfnt_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 15860 bytes
SHA-256: 0c2e66c6f8c02f7ca34487b7937fb4b40119f8b3a924de6d22e1c91bee21010c
font_02_sfnt_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1