Malicious PDF — malware analysis report

Static analysis result for SHA-256 2672c42f84e90af1…

MALICIOUS

PDF

76.0 KB Created: 2021-09-01 23:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3babd177c0d5bc5352cbb593e72583dc SHA-1: cd744da1861a03505ab0e03b0034d33b964372cb SHA-256: 2672c42f84e90af1125cb335f0b5219a8078b03bdb1a36e4a146ae7a64261aa5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a5b43b845b67d16ab781bb495a66b56b/kotazudagokasof.pdf In PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607838b4ef1cd---58566372252.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/76209332317.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/zekurikaxejonazazujifalop.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/kivojovixe.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/losijor.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb16753860d---palogosoduxoxuva.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/21528571377.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/mezemalutaguxowuvij.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/1213717657.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/71967325304.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/goleluribupetonuguzu.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/57992050621.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/37b34ab642cd1e2737867b76710888b5/nunefotadep.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/dfdc5c3d35a4402ca6ea72dd09d39cf8/xiroxefozopibe.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef4268eff---59806246779.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe68121076---60361358047.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1f93106a0---32878728176.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a2f4ca1111d76b74a2138c49cf262b56/72765016253.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/beketuwujofe.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120289b157fb---44576929435.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608826184e547---80814968090.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/rabuliz.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/dunupebewo.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/rapenovufekupapisejudetak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=grand+crystal+ballroom+at+the+crestPDF 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_off0000c3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F7 17376 bytes
SHA-256: d56b2daaf48f9163892f4c77855a3e13f12b98bba5b6eda727540a9f569bf00a
font_01_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 10836 bytes
SHA-256: 1ee87b92e63b1682e97f4547b53006a90d48e0c5e7e672e97e3389d02c1569e6

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