Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bce1170d14b9b1…

MALICIOUS

PDF

78.5 KB Created: 2021-10-14 11:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: d8d3b764822767c60d1b8e0a5d08a225 SHA-1: caa118903d5e3510903da0ab581e83d80fdd2f23 SHA-256: 54bce1170d14b9b1bc51de24af497d488fe231592576fd228ac348b97b009a4d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document likely attempts to trick users into calling a fraudulent number, consistent with phishing or tech-support scams.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://inwebjor.ru/uplcv?utm_term=marist+student+financial+services PDF link annotation
    • http://baracenter.be/userfiles/file/nozojajenodogevizutu.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/56855662629.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/zipijit.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210925040643_a0o9ph.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/dafodawiboj.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/tovenulusijegis.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/wuruveberufafir.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/45517205057.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/rolelububosutigal.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/pozarudenalibumixe.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/wunakuvariketezuz.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/11583033116.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/ruvupogumoz.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/9322103635.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/22328614116.pdfIn PDF document text
    • http://studiodara.eu/userfiles/files/jategavinidobufajuwujokef.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/jovopururatogibami.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/819e33730dcbd4ac3ceb8630a44c6fb2/70528735052.pdfIn PDF document text
    • https://phukienbep.net/media/files/ridivotupiwexapexutokaro.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/22770578735.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614164835655f---xaporoxulalazekokivaba.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/86901046932.pdfIn PDF document text
    • https://dol-rtknetwork.com/uploads/files/binimenujivamipuk.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0aa2d3b52---7672473107.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/87881929610.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/mukububabelusok.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_off0000cc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC89 10508 bytes
SHA-256: dc3202f2f0bb2cc34a064c0fbe67b774732ca36dbbd0849edd62ad4a5073edba
font_01_sfnt_off0000e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 18072 bytes
SHA-256: ac2c75dc25a44efdf3972bdcc8a64ee79bd9bb444df0d4d8fc0f57d3ee64c748

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