Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edee4f8f72257c1…

MALICIOUS

PDF

91.6 KB Created: 2021-08-10 09:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 1788f8c507922855ca2178ba27e6f948 SHA-1: 7345396357c6a78f4b2d2f581b67ea8b3286cf35 SHA-256: 0edee4f8f72257c16d837ace2d55fc04daa85faeea1f0bd78589d70d5295cfc7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this pattern, suggesting an attempt to lure victims to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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://medvor.ru/uplcv?utm_term=tamil+kutty+movies.net+2018 PDF link annotation
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a90aefd3802---50382319718.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/30598313605.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9007c85e---89603464302.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb3309a254---22418519072.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/gukixulugimoj.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/bifake.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/37346732423.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/xunakudiwifapotodud.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/xotunupebaludiga.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/rezudumuj.pdfIn PDF document text
    • https://arerp.kr/data/file///96947314534.pdfIn PDF document text
    • http://dgjst.com/upfile/file/16396485127.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/57652877637.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740f3ace71---98360180360.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/52892005997.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/murekugemejotokebi.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1056ea918---funadarirowe.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/zonapatimexoduzemubudig.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/54746869222.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/o621r5ub1ljq5adjp6b8l3f5da/katomojunenopevesil.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/69659646432.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/3614037781.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/56531913195.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/jomefutolowakepotuxe.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a269644a062---diluributikuvezazafi.pdfIn PDF document text
    • http://belovosushi.ru/files/25494795704.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 16548 bytes
SHA-256: 82dcfcaac72034845c08c168024eb3e41ad048e49e7ee5100401eeb95e7c755e
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 11072 bytes
SHA-256: 99fbaee67a2f4a154de8885d007a00a72466f46fddad42031339cb2e4efbd7d0
font_02_sfnt_off00011572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 19112 bytes
SHA-256: ee4d5c9ac4102fa25929b548bf0ba002eaa808c94e1eebe465be84318999c8da

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