Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac0c3ef78d2e77c…

MALICIOUS

PDF

92.3 KB Created: 2021-08-19 14:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c78ac549a23a663cdc15722e80a31e9c SHA-1: 42dbfc258a6513fbec879af34da61929d2184ba0 SHA-256: 0ac0c3ef78d2e77c62890cb2d332f8cefbfb979dc925b38306fc4986d52ab5bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised CMS upload storage, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079eee2225e9---95953496991.pdf In PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a76e0c2885f---pafuka.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/66935244348.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/xogiperazopuje.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/22323985233.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/78978697732.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c3465fe76---60373138830.pdfIn PDF document text
    • http://crediramasrl.it/public/file/86320273949.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/36509129157.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/raxujex.pdfIn PDF document text
    • http://i-dron.cz/data/file/kajedavigivisoruka.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cb4a58ed8f737eff35f16751d18c7b9b/42392194169.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d60e891563---42796387132.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/mopigataweja.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdbb479465---pigipirilifewefu.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/pebefisirelixovazas.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dodararutovil.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/838a5ecd34451fbfb36ee8ee01c688f5/lowelegitasenozevara.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/vh3ubmpvf78on25oh973a1c3n8/rusotipemisujubojezasa.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607297c24ba15---65797887581.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/60554333130.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b99f55d6def---54289705771.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/xawox.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/43118362987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=my+dyson+dc07+brush+not+spinningPDF 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_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 17592 bytes
SHA-256: c85c9f32dd9539784f96450276ecf4163aaebe537d858e53fb2de3c83b5c74aa
font_01_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 10972 bytes
SHA-256: 59394835507aaf274ccd2dd3f35823fceab89375f66559076ae608fc096c1ef4
font_02_sfnt_off00014b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1