Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7eeccac50146e27…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 02:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0830cc1ae5e3481fb6c248db82be1a0b SHA-1: 8cc618ead3590fa47ae5fdcfddd7ab98b724da70 SHA-256: e7eeccac50146e270d1ef0dac38bf6491628d79f4f3b481913665354060d3d4a
196 Risk Score

Malware Insights

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

This PDF document exhibits social engineering tactics consistent with ClickFix attacks, instructing the user to execute a command. It contains numerous links to external sites, many hosted on compromised WordPress uploads or disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://nomylo.ru/uplcv?utm_term=schedule+switch+off+android PDF link annotation
    • http://homestationrealty.com/userfiles/files/timipidarifazubawenodet.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/34989475585.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132f09e1062b---66390616785.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/wifuvujopixolarik.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/sagunif.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/daguki.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ogls4t8pcv7p9qk58thj7f200p/68142103609.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137603743beb---guzivolezeduk.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130b03a52dc5---zotafamokefogez.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/92390149143.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/25578499087.pdfIn PDF document text
    • http://keramann.ru/uploads/files/vizuwugudojezuziguj.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/xubejegona.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/68012165081.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/zugabudirizulonunijaneba.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3be8239585e5164528f0b17e06399278/dugajusuxibimonemuget.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613f18668169e---mudubitimet.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/tazin.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/dagiporoguw.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/zoximolokon.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/37707603145.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/140an61p849est8brk4emip9kv/24591603386.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/50650144780.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_off0000d198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 10836 bytes
SHA-256: f9b3f1a86ed96ad04dcdc916ec0e32e7032e269e1b29df15edb6cdb4573975a1
font_01_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 19860 bytes
SHA-256: c0d121107a4fe3a6c153701d5a2aff581251f56e62ffda5bcadbf48938449f81
font_02_sfnt_off00011e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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