Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a15f264596b4fa1…

MALICIOUS

PDF

79.6 KB Created: 2021-09-27 02:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: df789404f247719bc0a7bf5d573b5374 SHA-1: 2fc8568757dd9becc29840218ce4e445a5bd0a38 SHA-256: 9a15f264596b4fa1401985bbb53f6146cf73c441cad201fe124b409809b5299b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves luring users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://garglob.ru/uplcv?utm_term=ifun+screen+recorder+apk PDF link annotation
    • http://novosib-sport.ru/ckfinder/userfiles/files/55273389151.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s0q3tjnb9ph4hecng05oamlp25/59772966325.pdfIn PDF document text
    • http://huntland.hu/upload/file/vomupuribotisusuvos.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9cf96203f8303345b0b1abddf25ff442/buvoki.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/sofowonura.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133ba3f99a21---90294573131.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210912141414.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/98083288318.pdfIn PDF document text
    • http://hengfengpaper.com/filespath/files/20210918110756.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sidelikiramalemajimawif.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/60173813068.pdfIn PDF document text
    • http://seamacros.com/upload/file/tasib.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/49356869212.pdfIn PDF document text
    • http://balone.net/_upload/file///gapefisemumaxixujobo.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/rarubalisunumuwepakifir.pdfIn PDF document text
    • https://swiz.eu/files/editor/mokufimikovuneputufemolu.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/xazovi.pdfIn PDF document text
    • http://builderall.info/userfiles/file/xedonanolazekarux.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/728ad20123de023e69ea8da4eb456a90/91793025631.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/wimemakudupazotuki.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/99509190580.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/36067376986.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/zuwadub.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/bomaw.pdfIn PDF document text
    • http://dsfly.com/uploads/files/33238786926.pdfIn PDF document text
    • https://desco.scp.hr/files/gajuzinoludiwugokananepa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA8 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_01_sfnt_off0000d092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD092 18592 bytes
SHA-256: 2113ba0323567e38af5922d2591a2a4d9c8bb633b23341a335a80b7874353b60
font_02_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 10520 bytes
SHA-256: cf2180123836a2febe827fa13fb1b1608d23e4200388e0cadffd56ca070b9199
font_03_sfnt_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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