Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe36b819401b7a0…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 12:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6bedbc533e0ee74841587c5016be1d3 SHA-1: c17e0c56f78942954866ffc86a89d2f98b157119 SHA-256: fbe36b819401b7a03be12f47c64aedd9182a76c5be53908a17d986024c66e874
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The critical heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document is designed to trick users into revealing sensitive information like private keys or passwords. The numerous embedded URLs pointing to potentially compromised or disposable hosting further support a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://foodsafebox.com/ckfinder/userfiles/files/65863048794.pdf In PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/bagezisevutebaxapolax.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/befiwokezazadetekobigaw.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/kexijulemurekixonuj.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe22c68a8d9---diremadax.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/77782090475.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/6171974866.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gilegoratagak.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba02ad3110e---17683044992.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/10362098854.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/kofugugobogopuvisudovibek.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea8907634b---7626253373.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/33647172768.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092586008ee2---malimukuzasot.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/35849214662.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/53a94587c4f17fd550a7aafe0f3062b7/serewibutenomajan.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/93857092305.pdfIn PDF document text
    • http://stfrancisfrankford.com/clients/9/90/9051900d87e3fdd5bc97eff612ac54c4/File/74807529194.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/golabobanami.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/84007911231.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e6098b5b7---2910941468.pdfIn PDF document text
    • https://numberonerevolution.it/file/voximabunele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=remove+password+from+pdf+without+knowing+passwordPDF 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_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 17156 bytes
SHA-256: 9dcbab7747c41b08f12c11c6007e8ccc29aaaebc12b818f62e731dfc75b69f01
font_01_sfnt_off0000fbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 11288 bytes
SHA-256: 2a3397729557518c6294c8bdd19bad326b1115540d22a33ea0bfba640f780858
font_02_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1