Malicious PDF — malware analysis report

Static analysis result for SHA-256 7619b67548aa6cc2…

MALICIOUS

PDF

143.5 KB Created: 2021-06-24 16:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 347fbad1426f5e49f06f23fd937fa814 SHA-1: fd1cd4ce3fed3fd4dcc7b0f832890103f6fedfb7 SHA-256: 7619b67548aa6cc20f3f2f2b8c85812df3964c94fd4329f144dc441228db43f5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the extensive use of external links points to a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=techniques+judo+pdf PDF link annotation
    • http://parvazyab.net/basefile/api203/files/mesasur.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3e93c06ab---dukevu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bb282179---biminovoko.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/kotizotubojajusupa.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/83781614584.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/sejisibolexu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16080cea07bcbe---kifuw.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9a1a86144ce8eb714bef5dd53b7bc9f0/61438877578.pdfIn PDF document text
    • http://usagimatur.com/files/others/65802312864.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4afb691b6---31141833892.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c9872aafa7b3dcf3350b99906d68bb3/nekelata.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20eb6876c6153ac4f70b37956ca5b8fc/22715134611.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/46190751819.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/laxasobelikofuwid.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/ae17275074268eca949f2ab633495243/96421766595.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4b7ba4ebfd8a6c03f822ac1496206055/19337674996.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b9335ed4---wodifafozulijitinowevo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/da44beface0600c3db0fcced962df062/78971699258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18410 33520 bytes
SHA-256: ca1e1361cfa9f813786c8fb91f14851b8debf01a32cb38f89115d1443e8a0178
font_01_sfnt_off0001e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E94C 4860 bytes
SHA-256: 54a43d0f846ece222cf0b3a7f82e39f7f0b0924c48743113ddacc4da2f6a4337
font_02_sfnt_off0001f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9BE 11516 bytes
SHA-256: 3b1c3527c689c177d0505313b3dc5ab7555a08578c1a9d3e8509668a0ad1cd36
font_03_sfnt_off0002206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2206A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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