Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdb3697ae0d641b…

MALICIOUS

PDF

88.9 KB Created: 2021-07-04 07:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94752204362c41b90dd4e47349d73a7f SHA-1: 54d52ecb5b2404b32d00db86c140486861477b44 SHA-256: 9bdb3697ae0d641bb2a38f5ebb51b009059a4fa7e3876d903c5d8a0ac4195b4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=coc+hacked+version+unlimited+everything
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/j0t75194a993ie6jjhkufm0psg/29120052274.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ae685cd1---miwoves.pdf
    • https://anyimaker.com/upload/users/files/27167208594.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/wupofisumon.pdf
    • https://hmanagement.net/userfiles/file/rawibajaludusuzupep.pdf
    • https://narimasu-chintai.net/jcfiles/file/19692453630.pdf
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/32676270103.pdf
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/48043707430.pdf
    • http://esistore.be/userfiles/file/makudumanasoxati.pdf
    • https://lawina-radom.pl/files/file/rudaposuxazubaxozebogip.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210701023336.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/148a58e1cc421bde226829ad4014b03d/wejikakiloxukedisilabukuz.pdf
    • https://kar360.com/resimler/files/rutosegipiroti.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d79561a58be31b2e861d4c799caee2a0/zogexigezamabajuj.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/g8pafereqr1cob5jrvk8hf46tq/10564415284.pdf
    • https://marbeyoyun.com/calisma2/files/uploads/kizew.pdf
    • http://aitrans.org/UploadFile/file/F1202105172111513614.pdf
    • http://matstravel.ru/userfiles/file/maxunuwiwoletunapep.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d8e27f09---mexixumebekowewurididoko.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210617120545.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/96d13de30bb5544a5682002e53b795bc/bobizujajufasexu.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/da9391934be5349092690369fc227fcd/tajuf.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e35cb474c---jizerulukalapawagidal.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a6738792a---7103010080.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f867.bin
1c47016786741116064b3168f52fd5b66f157f62b30dd8890adb8be44b5d52b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 16952 bytes
font_01_sfnt_off00012453.bin
8ab9f98c5fba7cee1f9cb6a8f464ca0eeb6ecd9e398425bb801034ef368557bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 11220 bytes
font_02_sfnt_off00013e4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4A 16792 bytes