Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc864acae87fca7…

MALICIOUS

PDF

69.7 KB Created: 2021-09-30 22:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9fda066e4031bb026cf7ae87d3a7509b SHA-1: d77978fcc100418fef493877963baf8611d3396c SHA-256: 5cc864acae87fca79f37ae6bc655bcf86d182b97f0b21e50a2072f5a23dcded8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing trojan by ClamAV. It also features a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious files or redirect users to phishing pages. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=snoopreport+free+apk PDF link annotation
    • http://caffepontoni.com/uploads/file/liposuvezuwewezupodared.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/faxizufawesevuzoripepa.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/kuzasurosabot.pdfIn PDF document text
    • http://xn--c1adbeke4asdefy.xn--p1ai/ckfinder/userfiles/files/lejomukinovekefowatuxepi.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/katitavederizizenutakewo.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/41915670857.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/80074276429.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/tagaretiriketa.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/5324960522.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/dncqd8hcgs5t45u59lo9ni7ett/78977473832.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/44168565662.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161350c6430cbf---67577771805.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eacffea6eb---87624066873.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/lokafisewunorufak.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/govir.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/41571138052.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/15562688472.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/43552770691.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16146fa6cead7d---mesevosata.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/3067422341.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/85050342142.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/bukexur.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/13360935380.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/418dc8da555534af23fc3ace0ce2a25a/xotadojepe.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/91883959167.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_off0000b108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB108 15904 bytes
SHA-256: 16067f1d31af2567eae18bad8580a21ceb745e527468f38e964927ef2e3339cd
font_01_sfnt_off0000d8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 10212 bytes
SHA-256: 3ab38b4f9e4b080e2b5370b8e4aa2cad47a3563f3e3bc20926388f438f7685ed
font_02_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1