Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0207e67efa4b2b…

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 07:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 940f443a415d28b73721fd6230aa0f2f SHA-1: e9855c83d3610105675a6c562d27da5032bb26ca SHA-256: fa0207e67efa4b2b6844c2220e4ff1a87bc40cba9af0d4dba71d7b3b8c4891a9
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised websites and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the heuristic findings clearly show a pattern of redirecting users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://huntic.ru/uplcv?utm_term=holden+astra+2008+owners+manual PDF link annotation
    • https://dcoderesearch.com/uploads/82664607073.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf02c0c4f7---zekaxuwafejenu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094882969ddb---98204578282.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/4b47nclgp3cjv43d1jk5lfv26p/lijanijom.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/20710825981.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/27839351431.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/jadesimisinaxumiz.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7424880f5dd90f4f3ddc0f177cb91634/65601445668.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160874cc465b37---13968499023.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/036acf311cbf278f41e08d8ef835d58b/xoziduvukokut.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/62655722707.pdfIn PDF document text
    • https://trieurodata.ro/images/file/12777998836.pdfIn PDF document text
    • http://ailizia.com/userfiles/kodevozit.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/bosobuzude.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/pimuguramuzuwefi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607757f0bcec4---25431425810.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/54621540227.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/judowegemonupolitanama.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/21435603708.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/viganijoxorat.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/6934863631.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0d97c9c0f---tikevimusapifiged.pdfIn PDF document text
    • https://synersys.fr/contenu/file/musipuwufi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d92512072d849e15a973485e10955436/pipatevetofikijifubape.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_off0000b64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64A 16104 bytes
SHA-256: 306c2e2ca37f2cdf424db55c3a7ffe9adae7e3c92258dbca40263f2d639eebcb
font_01_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 10944 bytes
SHA-256: ceccfcc529e4de86bce47fa206c55fde76b9fb5d32e675b0afabd57d16775bfa
font_02_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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