Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e924744005db2…

MALICIOUS

PDF

384.9 KB Created: 2021-07-29 15:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ffcbef66b662e3d80d023acc65078edf SHA-1: 47b54c7dff5ee8141ec2c428492857c49e54497b SHA-256: 097e924744005db2cd253fb6ad5340d2b00e8aeea23bf7154d9afa2db8765bfd
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as a phishing trojan. The presence of a link farm on compromised infrastructure suggests an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8992

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.
  • 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://zonwering-belgie.eu/ckfinder/userfiles/files/52514068480.pdf In PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/27157995468.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/sikagukisamuwalapa.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/72371163163.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a653fe5ae5a---67208530323.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/87073897367.pdfIn PDF document text
    • http://pnlcoach.com/misc2/file/In PDF document text
    • https://ncvpte.in/userfiles/file/vipumifotapidoxitewegopis.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/68079452152.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/hm7q5ekrq0uv5mkrc8g87l1fo3/96345412584.pdfIn PDF document text
    • https://bliznacite.com/files/gibamefiferene.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/88421625528.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/41343763833.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/gs36d7vlejji7b0m8mopsc40c6/4144780790.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/30d0457b6fa4b6c9b827c73d52d4a4ae/93880830841.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/np5skmdsp74h8ghv8najb049tl/tenomokoda.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c219cfb90---55530781526.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/zizesutelukave.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/63951b9d4c37693bf7414980c005adac/jazer.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a90aed8c3083d03ccadd9a8c427f0f8b/rezetux.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/95063312366.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/29102104094.pdfIn PDF document text
    • https://ccskin.com/geektic/files/figujuzozurufugofibaf.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c338654c3f---zetobez.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/9708218286.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add59d9cfb9---53517934702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=nei+kung+de+la+m%C3%A9dula+%C3%B3sea+pdfPDF 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_off00058c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C52 20796 bytes
SHA-256: f6fffa525bbb342e7c1084b43a383d0fbd69f58c167aa2ea815bf502c71ef431
font_01_sfnt_off0005c0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0005d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D903 10984 bytes
SHA-256: 9264d6304142ec767fafe18f982d27af3b66f3907fb761660ff2e3cb5cfcb232