Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b34a7c7db24c765…

MALICIOUS

PDF

82.6 KB Created: 2021-09-15 16:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 81fdddb55cfca5f77f6b1a626640fd1b SHA-1: ed98931dc9fbc7dab86514553c411d4361f7c3cd SHA-256: 8b34a7c7db24c7659482c591d824c3b7b424c40b7ae4b72a107d256dc4fd724e
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cdn.eagle.mn/uploads/userfiles/files/3059501887.pdf In PDF document text
    • https://cakenflowersonline.com/userfiles/file/83782825687.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/zijelonude.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/bomunewilezelupofawi.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/fa900d9243a7156fb38abfdcc2bed3cb/bofaxixomidodaserugegiw.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133ce3d51d6a---wetonavamud.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/lizajise.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22851401837.pdfIn PDF document text
    • http://badgerhillfarm.uk/vefaxamuferisalufemineke.pdfIn PDF document text
    • https://agermag.ro/mm/file/vedapizunonemunenaba.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/kidunopi.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/n5blhe5hmafalsiim6r1kf47j1/naduvojapajipofobugolobi.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/63638416914.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b487ed12f5---fovasapowi.pdfIn PDF document text
    • http://heizler.hu/files/file/xivakige.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/rubuxivudarusit.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/nasal.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/68780941118.pdfIn PDF document text
    • http://thegioioto.store/upload/files/zulejegi.pdfIn PDF document text
    • http://recrute.fr/files/files/5400207229.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210904030009.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/nufazuxa.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/89103772498.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/lirezasanosap.pdfIn PDF document text
    • http://freeski.hu/freeski/file/50450349187.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/45620303226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=videobuddy+download+latest+versionPDF 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_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 18120 bytes
SHA-256: 9a23bc195af5a8980a6b6079e80040f82c71878dce0f4da72f8a4bfd6157995a
font_01_sfnt_off00010b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5D 10716 bytes
SHA-256: 4c3c42c48be461e54de4edaa4f7e2a7ec67b79c6d4257c21e0ba33f530bb54ef
font_02_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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