Malicious PDF — malware analysis report

Static analysis result for SHA-256 6808efecc530f571…

MALICIOUS

PDF

93.5 KB Created: 2021-07-06 14:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c303a37d636ab72e591a14e0b637ce03 SHA-1: a0ef888a0a0484c8203f963a8544722426960c1b SHA-256: 6808efecc530f571f95b875d61a10080b1c83e0d3ee1b182b75303500c3e488b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many of which point to compromised WordPress upload directories. These links are likely intended to lead users to malicious content or further stages of an attack. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09a0464041---takutomatudexupif.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/kd77kqg1djsfvn1a92790glike/buganaxiludegelewobitoni.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eqficjte76j7hu7ib09h3hau4t/45442162792.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/3226fb47023f758ef55393464b820d43/burefavivawovu.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0811969035c5a9e5cfa5f7aeb645274d/kurixutewesotifosu.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ebbdbceda---87647305248.pdf
    • http://capital96.com/userfiles/file/29352130540.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080655a83727---sirozibidejaw.pdf
    • https://dynasty888.com/image/files/20210531_075637.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/1130920994.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac31becd687---molikonevixegusasalejofaf.pdf
    • https://local-atlas.ru/userfiles/files/73978299740.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073e141885a9---11228471559.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1dc0b31a4---xisezizuvupuwilemi.pdf
    • http://asirakademi.com/resimler/files/62556426797.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3ef69cbf127351746d41ab2a3bdc8799/20959074044.pdf
    • https://doganagolosa.it/file/jarupopekuwema.pdf
    • https://tecnibat.net/uploads/archivos/59397285796.pdf
    • http://musicpark-live.de/userfiles/file/mopide.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab0bd4ed0---12302448758.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076205911069---99184261503.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d102864c2---nedalaritedidako.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7e2b4221e271e0b0598a81a98c97197a/47170338665.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be7fecfca---99972889870.pdf
    • https://mama-light.net/business_school/uploads/file/45045408396.pdf
    • https://ssvacancy.com/ckfinder/userfiles/files/woletipanuban.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=jurisdiction+in+private+international+law+notes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a7c.bin
bb9fdef75093550916400a6a3c02e6c971d005889984337a10451e5599ebec19
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 17472 bytes
font_01_sfnt_off00013739.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13739 16792 bytes
font_02_sfnt_off00014f50.bin
962ed0d3de06491385f6fc675f8a9cd577bf814ba9637290e24f6985949c039a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F50 10752 bytes