Malicious PDF — malware analysis report

Static analysis result for SHA-256 f010900cc99f02f6…

MALICIOUS

PDF

214.0 KB Created: 2021-07-06 21:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6170fd0459fa5b764aaf406820eb8b80 SHA-1: 99160a8bf6f557987c0a607924db259bf16d77fc SHA-256: f010900cc99f02f6ba5936f7f3d87e8dc10eac433791b4562af792c42720b937
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm and SEO redirector, pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The primary IOC is the redirector URL used to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/4585bab884c46541bbda50cd8d871ed7/pinopijakokaxudif.pdf In PDF document text
    • https://bdaudit.ro/userfiles/file/lasalubuwubodipukoguvite.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/pagobixe.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210521055306.pdfIn PDF document text
    • http://retailcop.ca/files/69089583439.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160e3726b53deb---97338531556.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/53e5ad992c274a3b840b2358e2f367d3/30086762072.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/d0ue98ohun121ekd1mdgd5p8t3/riguv.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a11830f3cf3---totojutakinenagoruwepap.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a390f9827fc---golodegapubagemudi.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d432aa6e6b---10697109305.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/lokafofozitusoseko.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b613445f477---78399613950.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd2c9d51c---sajoloxafozupotef.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6ed68e4ef---72201711835.pdfIn PDF document text
    • http://builderall.info/userfiles/file/mivuvixojezebir.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b52e9a9a7f2---7827074048.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/8116185577.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/39036789693.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85900f20d---20738116230.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/vagejapepel.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/814496cb0317c423d1d1ac94ca8b752c/92224654864.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/wezejite.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3c3b34aa9ae291809f58b94559761def/97503947939.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608256c4543a0---71073508627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=finding+unit+rate+from+a+graph+worksheetPDF 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_off0002e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E446 11156 bytes
SHA-256: faa167ff39e6bfc2fdbf0e08d6991d79fd0fed8d5e67cbd4568b0306dd37b689
font_01_sfnt_off0002fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00031616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31616 19540 bytes
SHA-256: 405a8a41f545dab255f72717e0e4f98b2387b791da9beb68af8f8b4e81649081