Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb7c00dc57503ff…

MALICIOUS

PDF

99.9 KB Created: 2021-08-21 01:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 67560c44d8d998f6074513fe14d1ca89 SHA-1: e67ab9904aae3037e7af721880f43fbb7042c1c2 SHA-256: abb7c00dc57503ffce107ae64c3927e47b51d4e0d768f838d86a20b88efdc36c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to leverage these sites for distributing further payloads or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a30fe886774---wonavapenap.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160792a9f51e2d---nuloxubonot.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/fibalomiwi.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/19091481792.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16106161e6383a---36319117471.pdfIn PDF document text
    • https://ptogel2.com/contents//files/83331779192.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083acae604eb---gigabibes.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/28942409050.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/labus.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/77233603033.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/nowinexesegevuzikadanag.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608966a363014---wojafivopo.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/wafisoludezowixu.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/zoveregakekoderudeduxot.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/33600868528.pdfIn PDF document text
    • http://armanetti.com/images/20291010486.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16108cb20600a3---20841628124.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611975f057eb4---rajifunajorikavagikel.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e452cebe812---gifegebanenov.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/45005378341.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/zejepalowolerixadi.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/81768792987.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/32907422855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tecnolog%C3%ADa+y+confecci%C3%B3n+del+vestido+3+descargarPDF 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_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 20084 bytes
SHA-256: a57a62744838274d9749cacf4699e4bf2d2632f2558a8761ad053a0da54943c9
font_01_sfnt_off00014c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6B 11164 bytes
SHA-256: 33e994274cef012d2c92636ffddf8ec1ae4518f68cd12f44fdd759788fdfbb4f
font_02_sfnt_off00016646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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