Malicious PDF — malware analysis report

Static analysis result for SHA-256 7509b8e83479fe70…

MALICIOUS

PDF

86.3 KB Created: 2021-07-05 12:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 534d5fdc1543062151478e42864c69ed SHA-1: 5dc5b8abeb9fecd2dbd72a6130e94ff5e1345247 SHA-256: 7509b8e83479fe70a7931e9fd913f47cf751a2b1e5c5c4e834af595291d22559
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://cructi.ru/uplcv?utm_term=free+fire+game+website PDF link annotation
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/293e95768471bf7c959c4bc513d18156/varezopowo.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3188116d3---4660981278.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/72520777414.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25f19e086---pekotanutewexofonuvibopup.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/57140359668.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/taranikelatifapevunu.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/21979026162.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/55729137055.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/meloxejibilonotokel.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/74401185775.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/52ff05f2029a2b3d87bb903e9a59f5cc/49597731281.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/83056310378.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/danodopenenefuvujerilor.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/33368968445.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbed97aee3---bonarozixobibene.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f90f77bc81e380ab27fdcf80173c9bc8/40264451984.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb1097865---74832217779.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098645432e5e---95129415199.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/223566b43c5cd866a2aae8a0083292d5/mugolarozuzutisijiriluxe.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160bd18152e441---reborafaka.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/guxubofaze.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/fofuruxeviliwibopogawu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/de88271f74e429eb7ed9de4e2d2b3d86/97387278178.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_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 17308 bytes
SHA-256: 4e54c0b3c713ec79c692751a1a4b224c703008e0b5f46a99aced11bbaaa96e89
font_02_sfnt_off00013405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13405 10492 bytes
SHA-256: 927a6eaf5b2543e1db6350c40c44b841c333c473773b3c5be570a0b43c51a2ae

Open this report in the interactive analyzer, or submit your own file for analysis.