Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6e3a9ee7ad0da6…

MALICIOUS

PDF

92.8 KB Created: 2021-09-15 10:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eae1961d981576ab8e0ad138c423ca53 SHA-1: 04eedd71a11a4b020455124344595d093e3c2b23 SHA-256: bb6e3a9ee7ad0da63cf0f135a1a88ec00ab7629bc3a8f18398e88a5ef1223f4d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=doctor+who+series+6 PDF link annotation
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9010dcfde68643a638d1deb9e9e4a40e/52171690726.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6a97dc3e1---pakekagafusivikebo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16141903bf08a6---74464737573.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/xadugebi.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nodegazuxizisefix.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/11181610402.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/301581d833366a110640e4f018fad00f/49438403173.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/zezoliwarasikajaxabupog.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/78270921364.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb839e7d98---66860876975.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/61222232548.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8dkmplbjfv4bcgrtr83r83d2bd/movekenelekuwozezo.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141778fb7556---torat.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/nopupemetimoluxokowagokex.pdfIn PDF document text
    • https://atlantidegattico.it/file/komavarimobofami.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/vomituweviv.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3b9f6ab294579d74400645a6c3523c63/kekofaremiwujosomipufexa.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7cgithk857co72rgbpfvr89d74/24202304235.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/50061818697.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/wuzubivomolesosove.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/zuwopix.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109041121491388.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/94596938171.pdfIn PDF document text
    • 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_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 10268 bytes
SHA-256: 2a1a85b15ee2d17014a4bef0140ad77eeb6e954d8d2d09723080164d006cd6d4
font_01_sfnt_off00011f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13771 17684 bytes
SHA-256: 59e6612315e339a000d589ab3c4119ccb737b93f4b1073f13bf99395a355677f

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