Malicious PDF — malware analysis report

Static analysis result for SHA-256 edea06567afbe2b6…

MALICIOUS

PDF

86.3 KB Created: 2021-08-28 11:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1d70f5f7c7973a4116d5c6a94b9738a8 SHA-1: 14dd2a12b7b1ec415312b18f3b71e717732306f1 SHA-256: edea06567afbe2b6595d971dcb6f43fc86487a08b3ec1fe79ccfcbde42976d76
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the heuristic firings and URL analysis confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607240f6a2c6c---zagiwejanebixu.pdf In PDF document text
    • http://fluellentrees.com/clients/58222/File/vaxelatebizox.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161264ed747fb8---lepulapolaso.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c88466c5c21---87860446668.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/40355732090.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents//files/91667418808.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/nefutazile.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161155024804bd---tizutitixejuvipovopopazo.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/62461194030.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078126d60118---sidelufa.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/mutoti.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/48712124976.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/36822985210.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf84e1d25b---rimajuweruxoxinopo.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/86709256125.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raxadibisizojatunuwedi.pdfIn PDF document text
    • http://siembra.me/uploads/files/70068520552.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/51877753859.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e44096b2b---91113898950.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/jesedixijobifoti.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/08/file/gomomawot.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/nidojadosokudodubakapos.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160f6dde68e324---14656048903.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/9100384745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=central+arraignment+courthousePDF 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_off0000ea12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 10808 bytes
SHA-256: 28a894d2fe4b7442ccc4712da9b0a7bd9c3cfc958cc102ed7e207b363ba10b87
font_01_sfnt_off000102d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 18180 bytes
SHA-256: e0aab2e5d103d60de2393c1b449cb75b0c8d1b40871a85184aad673ea0f04c28

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