Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ad0df675906799…

MALICIOUS

PDF

105.5 KB Created: 2021-10-10 05:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 64828fa026795ee57caf46a5df851067 SHA-1: db373a552efec9675891995f610a0d4a36c5e511 SHA-256: 65ad0df675906799e4b9743dfd616161ad47915a5c81ce103e002f03cadc1bc4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://brilsports.ro/userfiles/file///kedoxudugunepetidedexiw.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e25290f009---fozumajovamivepir.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/zatesikajagotosuvit.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/0qcd68ib8mpof2r3isp1ubqn91/vamatobeku.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136194f87845---25004574647.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/dogibagitumutaf.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/masaxepuxapima.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/tovefuzisofe.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/62233968072.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/sosokibeju.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/27168496571.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/68243553944.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/nujejexavesuzidemibedi.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/1524644844.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/gevaguwopojejirigozi.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/tadije.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/66081072148.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/c0738e4d0dbad99f48a3efde11bcc977/wawavizet.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109131509199069.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/34350118793.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/35914845742.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qrrkkdhqa79khje3b9fo2qupe2/5124019834.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/68114442259.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb95ee0797---98834248737.pdfIn PDF document text
    • http://bjjiffy.com/upload/lodebozoxeboviboju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=chapter+one+their+eyes+were+watching+godPDF 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_off0001338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338E 19452 bytes
SHA-256: 45b2d0a1b6631c7dba8f5b1a0141aa1be6d4854c9b2fa4d72091a3f39c3f4c04
font_01_sfnt_off0001667f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1667F 10980 bytes
SHA-256: 421f15a3ab4d2b065ec400df0edb7baeb9c283999efd27871579185bd0e25a96
font_02_sfnt_off00017fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1