Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6ccbf35a8d7dbb…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 11:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db68543bffd6998ef7697677eb0529f4 SHA-1: 1529b69b24ad9a718efd3cea2a4da1326b87a4a6 SHA-256: 6c6ccbf35a8d7dbbe2282140e12788c8e36542ec2004173c45800007d0ab889b
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://netiko.ge/img/Data/file/fanidoj.pdf In PDF document text
    • http://saltokisport.com/uploads/files/rekamumegogusosetufas.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe95f67b36---25388234529.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608704709fe8a---juvekakefixof.pdfIn PDF document text
    • http://robbes.nl/media/files/13369566517.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///guwinoperigonazugewo.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/55281a498c158f18a346d4700eacedeb/subegiwivexir.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/vutuxanakavemaxotopavig.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/dccab0da85454cf7baa4125fa9f419e5/78245066126.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/figimuzomifomujizotinito.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/2aca38c50fc5bab71a83a88ea6de56ba/xezak.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/a685ca48540f5a6c1cff6358bca8d737/19457898045.pdfIn PDF document text
    • http://prompol.com/media/file/gamaxaxugokoxo.pdfIn PDF document text
    • http://c-amc.com/upload/files/6923894812.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/guditedagumumazeke.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/dokemominigufi.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/lijoxokis.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jslsnj9icqie9cnd1mrsvprm57/39190183133.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/bukalenukimirukazol.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/jilakunuzegidezakid.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6efb88e4---16316848161.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/75935825597.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/5521703489.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e6704aff---doramixuwivimuvated.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=motore+combustione+interna+pdfPDF 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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 18380 bytes
SHA-256: afc7c8fd405ce4e902e2a03f058a57c4d6b111761ccd8971614395562c909cbc
font_02_sfnt_off000133cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 10968 bytes
SHA-256: 7afcb437bc6809e7d6aa0dd461e31810204f4cca7d2de2aeee3130eb77fd6be1