Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc32a469e1bc02c…

MALICIOUS

PDF

78.6 KB Created: 2021-09-03 16:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e1390af80efa51df465fc4ed96f8b6f SHA-1: 6d0319121496c6591386233a83cd52d654823882 SHA-256: 5bc32a469e1bc02ccdec5b93b3657562fbb60c510f8ece80e248088c686e1fc8
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate the primary goal is to lead users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://easypayindia.in/userfiles/file/55167890650.pdf In PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161251b556de22---92756091414.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/bibegujapoxojide.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2559a247b5---pulovakaxufo.pdfIn PDF document text
    • https://sce.tw/uploads/files/60b7a7626ad96.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611cacf296---85153487460.pdfIn PDF document text
    • http://emachn.com//data/attachment/file/32204487581.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/bejasipiwuba.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/85c5065ba18b9e7323c0aa0363a08b89/92157117384.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d281016a---16111226753.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/nq2ivcthprk756d0ngd18v0p33/15390852816.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/64365343185.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/43b559ea13ba27fc192cff0d5157cd56/wemadusuzixakixopukas.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a10c54caf---14235208251.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f38718e59a---46366732791.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/gevamikusujupixaluda.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/pagepipuv.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ivgt6oic0h51vihc0875ol1to3/99076007116.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/dufizokif.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/sugotafunogaxogubej.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/77782567533.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae1dac8dc---73544390175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=oticon+opn+s2+manualPDF 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_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 17936 bytes
SHA-256: 95860ab80d7cb5d1557a6190c48cbdb21d0246e3ea7a94256a84fbae37e6d6b3
font_01_sfnt_off0000fd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD20 10548 bytes
SHA-256: c7e50198b8cce0c8bf7ffa163c63e20c40371d5d3328b226cd1fb44d9bd5fe68
font_02_sfnt_off00011541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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