Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d862bbddc96407…

MALICIOUS

PDF

76.0 KB Created: 2021-06-30 14:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3b9eba9805a556306fb928eccb76716d SHA-1: 32d31134d9566be7b702dea1ff71c9a853382bb6 SHA-256: c0d862bbddc96407e08ba6b42bead9de813fab5f74e820859f635dc5792ff28a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. This pattern is commonly used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://precedent.by/_newsite/images_from_html_editor/file/49179911949.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a30ff836a61ad63bcadf2b1bb6eeec2e/dunurolamoferajak.pdfIn PDF document text
    • http://sun-eko.eu/files/file/92271112735.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1624921587.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/5761633722.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/87393103876.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780cf2110ed---nezulufe.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/47776611578.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/lipatupixugazarelisa.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/65054714471.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/qiarrm0g701mlofc049ha98br6/fupekunipizoririguzigo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befec72b279---xesapawizidasaraxi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8053b009---22634707808.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/23197653159.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/67058374123.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a0d954c0bf86e1a7cc6a1c4d0e4f093a/betusedafoxizotogivukura.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa2125f72818d896014cd4d25083fd96/pumesavepoduni.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/24487135087.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c283f0d4d---3636044890.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/15246c1905952e7d6681af026c71fa68/wepavorakarotasizosu.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac8c23eb5---61591238969.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4d4d2decb42e8b4872739af9c94dcb4b/42101631969.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/80505796926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pdf+to+ebook+converter+software+free+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_off0000c7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 16204 bytes
SHA-256: 08cacfd9b0b731adaad4e6604df60f984d723a2e660ae5d008b009f41ddf0be7
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 10764 bytes
SHA-256: 538658ba75bd3ab1a936ed093a230bada8bfa4e179befa1ea9095393f7e8e147
font_02_sfnt_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1