Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48112282688576f…

MALICIOUS

PDF

70.0 KB Created: 2021-10-04 01:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 57d89c9327cadf287001f79052ff6767 SHA-1: 2b5d3b63797d799f3eab1df977aa5d1e4d443345 SHA-256: d48112282688576f5d12fd951edaa56a23b963cb14d0b9de6a35eca55db00e5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to lure victims. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=african+american+conservationists PDF link annotation
    • http://medicalproduct.hu/images/files/42475269221.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/82029349441.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/fuleradefasod.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141ae4a1b30d---subizumolo.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/tefeduzusinumuvopepe.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/mutunikokor.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/3164458641.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/32166620143.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/ranatumineremamon.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/98893299499.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/nixumazamularude.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/69c180728ae08761c59e14da45e70dd8/zuribezuwe.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613652157244d---92480270727.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/93630401091.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615765c4637a2---tekitilixitudok.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/86964088844.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/jagakefef.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a1de8596d3---depedalikigulas.pdfIn PDF document text
    • http://elma1.ru/!upload/files/33087873243.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210916051945.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/12787581139.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/sobejamakufunuvonuvumep.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/kuvexitujupa.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/59370459216.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/31674327917.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/fonogusetosokow.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/modibe.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_off0000b54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54A 10496 bytes
SHA-256: 5d6ce0920a15a85b03210725da616beb785916b2563829c9ba3f6d495f3b148f
font_01_sfnt_off0000cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 14604 bytes
SHA-256: c72bdfdc24dae55bb5dd28b98cb6d31c43035fca297e2c560b58e519a34e4491
font_02_sfnt_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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