Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6c497153323965…

MALICIOUS

PDF

80.8 KB Created: 2021-09-01 20:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 12c8804ef392ac89bf8ceffb722c7e5d SHA-1: 2285149ea7803e893c33293dec94ecc995e34878 SHA-256: ca6c4971533239653a571407a2eb496d6ecd72be58c3ae0ef35c64d1c572a18e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3cceo1i5hm71sfk87al55ao0c9/76211269904.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160af641e3ca61---kakugifulapelikodibox.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc1eb6baa---43022414006.pdfIn PDF document text
    • http://ombs.ru/uploads/files/guzuzutijuguzafinatig.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/wajiwexigabefogokoz.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160768c22ac4d4---baguxotuwipas.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3hd7qij8i13o7hv683ulor6nj6/nitaresamazarudomijasev.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/fejonuxuj.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/lajovanixamapadow.pdfIn PDF document text
    • http://vititanon.com/user_img/files/wapojafowajav.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/luzuvizatofepuvotinaxixu.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/23048819548.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/bebov.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/83777287839.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5c8e4a82d---vutazizu.pdfIn PDF document text
    • http://lecostationery.com/files/file/70183705220.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/ziraminixuzidudoguvebiki.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869fbfde03d---97035927541.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/zazupetofezawowogo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/4d78bec389b619da6ec02e94fdf835ac/90690145029.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30da8a99d3---xesuti.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/80467565845.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mtdmc8eb81q3bh7pp7qt46atjt/foxababejovefun.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/lagabo.pdfIn PDF document text
    • http://soupworld.de/upload/file/52066402005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=counting+by+10s+singing+walrusPDF 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_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 17384 bytes
SHA-256: 4f795341a396872a5ed13d266b03eabaf91e15535c67990be65eb0cc6788ee6f
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B53 10796 bytes
SHA-256: e4fee87843e777ba2484654cf958159d46fe13954841a6b47933d14e8c4f62eb