Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd76c35513a229a…

MALICIOUS

PDF

85.0 KB Created: 2021-06-25 19:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 08411518182ab184ee50d8fd921bdc87 SHA-1: 496411462aa89ab0b793de5a9838ef2e38c88e41 SHA-256: 0dd76c35513a229a0f84df431d1082d0c00dee643ba2101f56b9dd7898d0767e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed as a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83c078504---wawesobudajujikixuw.pdf In PDF document text
    • https://incoyun.com/calisma2/files/uploads/zulerotavimevus.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8faebe1a68bbf5e149b24e2ea0211a6/58250507562.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/54624455951.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/dusuxowuz.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/kigazodasaw.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e830c45b---sokafamereg.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/wobixijiro.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/eb001b9027dd9878b961926e94636fc4/57794368776.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/83a621e26fbbc130115165cf3ec109e3/magosivit.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a574711101---65059521882.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/05ca11213b5cc8e266c4e1ecaa81f9f7/89467048415.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/23003695274.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/dnqfrp363lujlk181go0kc0gqg/79422540721.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3880203d0a52233b87d38c9a7c342309/varonavomutitava.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729372ca9be---51750205794.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/buwuxonijug.pdfIn PDF document text
    • http://normel.org/files/upload/file/18474357918.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/noluwomokodivasop.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/37131d272a8df23c4192ff88751b9731/91931501231.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160833d6d87c29---midufar.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/tinofoduvedulat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=use+of+garlic+in+the+bodyPDF 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_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 11016 bytes
SHA-256: a84db4d4643a7a3a24017b19cade373143a5edf42fa2cb03d89dd8030328caf8
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 16264 bytes
SHA-256: c27f5cc3a9ebba2c506e91a89d5c934318f8dcc29bff1da74d5f3ff1986e4b09
font_02_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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