Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dde0d44d7389de…

MALICIOUS

PDF

90.4 KB Created: 2021-06-28 13:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcd4cb2457b9d276b6ce4546767163e5 SHA-1: 14c91373f86cd3493b3b367393040211e02e1780 SHA-256: c0dde0d44d7389def7cb2aad34fbcbafbce0c518f9df4615c9a8c38050344705
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's intended to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=fighter+dragon%27s+dogma
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/9cc4642db81419b5cc3ddf78a5d70a77/vikivetiro.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b494e0b44---36990611626.pdf
    • http://utuin.net/files/fckeditor/file/48969912728.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/def9b7e4ba852ed9fe5557eb203919eb/27489347041.pdf
    • http://mywayrtk.info/userfiles/file/bumumod.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d961acb0822---nozagaretasevelojuvulojuj.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac00aac3f5---rorufavagitizuti.pdf
    • https://babamore.com/upload/ckfinder_temp/files/20210627100827.pdf
    • http://allmedicus.com/userfiles/file/10268582071.pdf
    • http://agcslohian.com/userfiles/file/57590311118.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/svrnaalk74gnrl8aun91geck00/11079420714.pdf
    • http://mn-print.ru/ckfinder/userfiles/files/30555520962.pdf
    • https://idd.no/ckfinder/userfiles/files/5022263815.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cfca295e4ff---bifoninulalilodetizofe.pdf
    • http://fittbikese.hu/files/file/13889920131.pdf
    • http://automotiveenergy.cz/userfiles/file/33861478762.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/sfcf95pc87n39ci0talb2sgtco/dureku.pdf
    • https://motiv8workout.com/up/files/93619345220.pdf
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/wivuviwepes.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b13d45848b---birudefinagurufidemo.pdf
    • http://kapelski.pl/userfiles/file/xalolon.pdf
    • http://x-site.by/upload/editor/files/lazitapute.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b1b7813f1d06b8d5b4c3768561e60e71/tivuzej.pdf
    • http://slsnn.ru/content/file/nogowapas.pdf
    • http://www.euro-fly.eu/userfiles/files/wutamopodu.pdf
    • https://osakadentalcare.com/contents//files/27749546135.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 16792 bytes
font_01_sfnt_off00010867.bin
401329e227edf22fa68738da7115f6f2ff74a70a57d5fd1ac7345802eb50a69d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 2112 bytes
font_02_sfnt_off00011204.bin
ba40fd35896feea3200ab01b08d7e9d1405099b97dff7b87791e71d1cdfc971d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11204 19140 bytes
font_03_sfnt_off00014213.bin
e404455e91b99ddc05fac79d855d98f9eeab0397760895bf4c0e4fe11d5fd422
pdf-font-stream PDF embedded font (sfnt) at offset 0x14213 10660 bytes