Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a03e5f1c8757720…

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 12:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4ebe09c3cee233b5edd17cb2a068398d SHA-1: a54503b20e01d14c86764f8412bb8c5fd04ab323 SHA-256: 6a03e5f1c8757720e7d5adb2e12cb3341673b805862d3e8a76005d4d4df3eb94
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://infrive.ru/uplcv?utm_term=prince+of+persia+sands+of+time+game+download+for+pc+windows+10 PDF link annotation
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/smoddeuqcl07ep1rm5ul3rf861/riveselexofiliduxe.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/36247053468.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/45674874889.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/7987079256.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/49372546335.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/rugavefutumelusuw.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/bawenebavirolepemepimez.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/xapesa.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/7ba80260af662eebec8aeeb6e1005c6f/tixurizunisetarizeri.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/44507382944.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/bijovosuwufufitulur.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/3183720355.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/14254230207.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/takoporuvelapadixobej.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/deaecd1a335dc363d0670c69e201ce1f/nolenegig.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/fipudofekaxekaliniron.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/lukikaw.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141107a26238---muxuli.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/96203241350.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/37019714762.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/43103743140.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/nilave.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/73051637445.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/xizamoxelisovunire.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/tigira.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/47841806158.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_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 17804 bytes
SHA-256: 8a32f8870b6dd3d196189c99b50d864b908324f3fb4a38d83efb9532988b743e
font_01_sfnt_off0001006b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006B 11224 bytes
SHA-256: 99a646a6497102abe5cf954b644ab2196ae6d2d43403070e679445b8b5eb677f
font_02_sfnt_off00011a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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