Malicious PDF — malware analysis report

Static analysis result for SHA-256 f146f0985c218615…

MALICIOUS

PDF

143.6 KB Created: 2021-09-06 16:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 57778cb793f974de6967198923dd0a36 SHA-1: 7c1e9b29f2663b8864fe18b640360b8f774773c3 SHA-256: f146f0985c2186155f78f89d37dafe725bae6ea2fd9a23e5b5758d4b2da88941
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/r8vtnj87c7jos38qrat1419u74/sulovukizerikufobokav.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/390064b0122bc1bade24b49e8a26f761/85145661035.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/lerufibogufafiwudelonuza.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/61084956486.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/11b4e22e70d10d13fa370f23a5e681ce/bapasabikuzig.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/86301150734.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/dowevebe.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077332983b8d---88146732197.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/lozizoga.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/femuzipe.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/166cb05bf5f06ed425645b58b103cd9b/fazete.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/d49c59102106795fa4631ab9a9847fba/muvubuwido.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/d8a8lvmgipsmbiod2uj0ms3tb5/42103537572.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8641eb9253cf5e6a83505116a3727966/39338228937.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/70751025094.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/kesozagugukojoko.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/d712b38e76dd71c98ae76b8e3fe5f4dd/foberisikodesafuv.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/72826611550.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607694abcbdd7---buzupale.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0871963ee---5069311648.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9a0ad577bf47f65a119f9cb568855839/66624695063.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/vikab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=accelerated+math+worksheets+7th+gradePDF 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_off0001c8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0E2 10832 bytes
SHA-256: 73e8af3bcad633784f5de0aaac2c61fc570cccaf98fddbde30160ef2a74f93cf
font_02_sfnt_off0001f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9DD 20224 bytes
SHA-256: bb4fd57573cdc31889a3a618c021d6b2b314143ec7cb21c1b1cfac9ea1bbc37c

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