Malicious PDF — malware analysis report

Static analysis result for SHA-256 60643a02225de9ab…

MALICIOUS

PDF

85.9 KB Created: 2021-08-18 23:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c0d1e8b02723b669db62c162fd34c7d9 SHA-1: d090c14beaa13e4b0a32d6f6950a90fb86c36d40 SHA-256: 60643a02225de9ab0f28011ed9fc094b36320e02707ae6c75c4de41c68b154f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially malicious websites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic of using compromised or disposable hosting for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://drafthe.ru/uplcv?utm_term=mobogenie+apk+2018+download+uptodown+android PDF link annotation
    • http://abogadosaguilar.com/ckfinder/userfiles/files/80350845722.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/werorobi.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/94438954553.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ca2a491d8323b0b542fb26466caba2e4/93540497755.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/soxedogufuviwegadelonixop.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/gujojebok.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/xatutu.pdfIn PDF document text
    • http://derma-dts.de/files/file/komegunovodixofuzobif.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/93963818109.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/vigom.pdfIn PDF document text
    • http://lobi.md/userfiles/file/bimafife.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a18b96737---60521491918.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/98461173103.pdfIn PDF document text
    • http://atek-ent.com/upload/file/19587889730.pdfIn PDF document text
    • http://pololanna.com/user_img/files/88332591468.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/27229566078.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/zekiwudeze.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/7197005572.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/kakigejixasevogisanipo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d262bd3633---45892851414.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11d2c2a415---vejajumupuxolezit.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/tevidujosapakiwava.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/luguxuzu.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/9g9ui719u6656ag9h9rvtdib58/nuzarojolavufulexere.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/oh86elbgktdd521ge3t296b393/tedanoripi.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/vaminomudi.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_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 11312 bytes
SHA-256: 4a5115671defe4f5fe1cf278141d7774de5d9de02cf9f1a3cbde092a722e4962
font_01_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 17280 bytes
SHA-256: 72465c76b689fe15de98131c16077d9eb647ff2377fea9e6b655306c768cac96
font_02_sfnt_off00013062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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