Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade08e6d465bf103…

MALICIOUS

PDF

85.6 KB Created: 2021-07-05 10:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fb3fa2fb1efe17fdae944713cdd7f6de SHA-1: 9701dacefd638e1569da794114ce135dd605504b SHA-256: ade08e6d465bf10307c2ea1935d5ce18020873f99450f9209b46abb391626d10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised WordPress upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a vehicle for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://mosjob.ru/images/file/xakupokotifezamaba.pdf In PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f2151abc3b6a4d1af937f417d5b7825e/befuxorofixajusepeke.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/63923298767.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/kh2gdl5vresjmq1m56ee9huf4m/marijafula.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/56540867604.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/051552087511.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/7610376005.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/l7ocg69mjgjocf5i80e5jun8gv/52955255381.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fcdcaf15c2a19ea3a6bc22bdc8719e46/vemivunagi.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/73320961731.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c062bc4f726---zabugarusabozevilufurew.pdfIn PDF document text
    • http://mamam.by/upload/File/file/56158486390.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607066766229d---27504673220.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/35djhorv1ds46glkvpmsm2drmg/penogidasewipu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/96ece9d25407c15dec76ecd913a8747a/927417122.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/92462445143.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/88017321416.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b1b631632bcec5499fbcaed769820a05/wavadu.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e0ed5219eafa0744fc093f1d0d3f9828/33176255820.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/502a644b7cbc83d193a36e2c4948042c/vezojupuwaf.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da65f3982b0---lewebiva.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609355982ae03---29490873880.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa279efe2---wepibixipopakuvapadibijel.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/9792e3fd89b5b9c4b835c313b7d59a4c/lejekevijogin.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af8641bf40a---sosirasisow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=200+pounds+beauty+free+full+moviePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD181 11224 bytes
SHA-256: 2f70b78f28147029e433d3d9512536eba0f7422949901294410f1fbf7944ae9a
font_01_sfnt_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 18352 bytes
SHA-256: fbfbf256d5d600b2e9dc0c204fb82ef9acf08453ee96768fee50db658270cecd
font_02_sfnt_off00011adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000132f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd

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