Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c94da4310ae12f…

MALICIOUS

PDF

89.0 KB Created: 2021-07-08 02:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9558a345a8618c3e3e81f93c777fba15 SHA-1: 888952fece89140a173c1bf310a1f2c49314f816 SHA-256: 07c94da4310ae12fd360bb00c52c572b98728c39328410c76d32d5a8f20b635f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://bukhatirhomes.com/userfiles/file/venadojobewebegun.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b8a827eda---4929142486.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/vukebojabiberu.pdf
    • https://bravo-hk.com/userfiles/file/vezolefereribefufekenamef.pdf
    • https://africanresearchcenter.com/userfiles/file/vepowebojananidib.pdf
    • https://dla-pracownika.pl/pliki_user/File/mutalumavemobakitolutime.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f114473c11---34722331438.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c064be513a---68514428113.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096afb6e514c---3995992047.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/88611895536.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4ea8c937eefaf8326b7801d2b1a932f/16567878053.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/3baff099fc69d2971cc4cf2636b916a3/vosopemeverusukenatalomo.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a0c41f4d---mawifapotatepixutumipafu.pdf
    • http://metamorfoza-krosno.pl/userfiles/file/24328443812.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a55b02df84f---zelilubuwibege.pdf
    • http://geyikkimya.com/userfiles/upload/file/fizoz.pdf
    • http://royalwedding.jp/images/blog//file/kimitekovadifaramarolurel.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cd11710ceaa63624df616107eb26efa7/minipinozukigijokebi.pdf
    • https://gastriklandsbf.se/UserFiles/files/vekafuwelola.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910520aea6c---41891973349.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/96196210819.pdf
    • http://ztkammer.at/uploads/file/sanujufenokod.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/c23b838bfb69a069bdeb8bc881a3be20/86867930748.pdf
    • https://llsindia.in/FCKeditor/file/94271640010.pdf
    • http://antifftech.com/uploadfile/file///2021051003003318.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/q8jroj6eaa9idm241955iohsn1/kutekewu.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7e018922679472024785816fc2b5fdca/fowolutuzajisafezuda.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097c00c57cb9---zezelejosufapibiromit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=watch+another+cinderella+story+once+upon+a+song
    • 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_off0000f9c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 16792 bytes
font_01_sfnt_off000111da.bin
0ebd37d6ebd65d6188b1d769c261c736f81f404a83d99867d1943e61e363603a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 11000 bytes
font_02_sfnt_off00012b30.bin
5ebf78755dd26778b1eaafa4f018afac5ffb4bdd58497240be97b75167646ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B30 16472 bytes

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