Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa7353cebf3093e…

MALICIOUS

PDF

80.2 KB Created: 2021-09-02 23:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a0ed592923ebfd3b4362b2693a508b6b SHA-1: a71b254c8814647222c4da4a2edcd3d059a6f941 SHA-256: 7aa7353cebf3093edcd99c8555d508cb6a983efdeb3e9eba77db13caa4fa98aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082af909510c---4563317656.pdf In PDF document text
    • https://classoft.ro/userfiles/file/bogowufivef.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/s2bfm5l9klbdnfqa8d77lje209/gobumawuduzotaj.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/lalijulimanano.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/maxutadidemerujabavas.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c546dca223f---9598521125.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/vuzatababesavekesu.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/19020343680.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/levusi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/071118057c1a909909200965964b271f/vefarazixozigesedizime.pdfIn PDF document text
    • http://tonystelly.com/clients/873487/File/66415752211.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/wemos.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/87549067010.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/e1jea6hhdln374ve39u46u0h5a/kebisujibixaxemitef.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a627f26143b---58541245176.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-25/20210625030126602942.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce78318a19---viguwudogupodi.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/70c31345cbce21ef2b9c736c65442f3c/29530174535.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7ke0944du67b9lng27rv651f42/figedaw.pdfIn PDF document text
    • https://totounited.com/contents//files/34918028147.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160e4cf65b8817---99919802498.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/11112165295.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/tojatotavade.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/23956296663.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/tiratogabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=metaphor+worksheets+pdfPDF 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_off0000d5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D0 17328 bytes
SHA-256: 558d9ac2f522b1b4490f6f635c7f005c42bafacfac7b3b24bb91649dbadc7a49
font_01_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD2 10524 bytes
SHA-256: f1c3f8f3b44b39b9fc54688ff45415257d8cf35437e861c6a7cb8365e90718c9

Open this report in the interactive analyzer, or submit your own file for analysis.