Malicious PDF — malware analysis report

Static analysis result for SHA-256 630d3264e7cc6089…

MALICIOUS

PDF

90.8 KB Created: 2021-08-03 06:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eae91af9801a795dff28846cd8c56724 SHA-1: 05002e639a7c9477d2f20d6819b729e936d6b164 SHA-256: 630d3264e7cc608938bb6815a96ad3262ff3b17ab0cb86f44542c3b898dee66f
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which appear to be part of a link farm designed to host malicious files. The presence of a 'download button' heuristic further supports the phishing lure. ClamAV detection and ML classification strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d35072b8a5---45183168193.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ec59b4fc9---kelewatikamuvapimum.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/66375018355.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cglilrv6c0gfhae234qvvopjr1/30773978461.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a699d6e3d0e---80933379660.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/75394869965.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/460d9df8cdb4fd798e9a2d40788a5fbd/65275570934.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af5efb7f3e---35775411155.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/935616171.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/tijuwagozu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2e0e39b62---96824423902.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/06c26c631027d73a85cde3a0dc59a64f/lulononujisa.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082ac95884af---24751894940.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3e4f608a4---73545296119.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b799426de0---vimolenutateb.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/gafixepesomifimiped.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/ximosamobivitenutal.pdfIn PDF document text
    • http://poiskvod.ru/images/file/jejaxedu.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160843b87774b9---38265271383.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/927560f0657c841030e2a9fface0b7b8/8352448623.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf38cb5f64---6701754160.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a1806a39---50921876423.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/c2sj5djjsa9tguna3krp08i1c1/14713314853.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/97900501274.pdfIn PDF document text
    • http://primaneighbors.com/userimages/35664859198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+vidmate+apk+freePDF 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_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 17404 bytes
SHA-256: 26fc6d776e29d9063b4a8bf85e46602638f793754a7b5e3b9c93c6eb66cf195d
font_01_sfnt_off00012ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE3 10736 bytes
SHA-256: 06efafebb7301dfcb3508fb6dcb60d8fe411524302bf920d35a5773ad3825f43
font_02_sfnt_off00014586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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