Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a2c05edbfbbc94…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 17:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 498083b996ee8b58ba5cf3a1e6678734 SHA-1: 77852027f9d3b98170b0b20805529cdb6cec5c07 SHA-256: 40a2c05edbfbbc9459f68415cdcbe79eb610a5788ca121a79f3a94b1e7e7fbd0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The file's structure and link farm nature suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb42d66bc3---powovotavamuraveri.pdf In PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2i8ehk3eiep8du2fl8t18k14q3/64022251440.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/jadarawibipe.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c6b60a30e6f19a3eee475d0a52afa8f4/marefomasaropewivam.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8b38f6f6cb772ef6db1a5b74a0e397db/gazivinokatu.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/50815826793.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/4f124f09e66c401d173ea36d742c79a1/79475961815.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/resojopas.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/cckc22fpcs080a6tct681arr7k/vufowefep.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/pma5gkvhr29pl9afm4f1pmeoe9/zusisofularitux.pdfIn PDF document text
    • http://chayka-svg.ru/files/tovotokodekizat.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef094421d---74471754156.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/22999872832.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f8e89330---jogezufepigef.pdfIn PDF document text
    • https://cafesca.net/ckfinder/userfiles/files/88866995671.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/12525027435.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/dsr92tp1do9k8i6kqc5vl6adsk/63174533878.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736a9556b9e---gudepesuk.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0eptnphk9nuotabcpivuder732/55260365241.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/1cc744d66647adc63fbd2de9178c62f4/90413293460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+many+tastings+in+a+bottle+of+winePDF 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_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 17528 bytes
SHA-256: 06c180b765b396a6545e8ca0e2ef7f6e36c31c1e2e083f46a53e765253742cd7
font_02_sfnt_off000131fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FA 10788 bytes
SHA-256: 4d7ec00e5233c3d0f923f6c62d3cdd97fe80ef84ddf906481053714f668cff68

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