Malicious PDF — malware analysis report

Static analysis result for SHA-256 aade7c6476d5bdd5…

MALICIOUS

PDF

90.4 KB Created: 2021-09-13 21:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a08bf15e70a49fb552d514741fd0ff14 SHA-1: 94a60c148985add335bd148c1c68cbc6844a36ed SHA-256: aade7c6476d5bdd58cafc7a6caff61a421aac838a78eb25df54a189ce3f97f42
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or link farms. The presence of a 'download button' heuristic further suggests a malicious intent to trick the user into downloading a payload. The ClamAV detection and ML classifier strongly indicate malicious content, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=midtown+madness+apk+download PDF link annotation
    • http://bipaf.org/2009_home/upload/editor/file/27342755333.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/kuleguxilofipovuju.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613992cce06da---nitudotetafafe.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pigubefo.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/7454898980.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/17015036716.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/noxigarivuri.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/kuvopud.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/28168611663.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16133dadd4dff2---pijumukazelidomixabo.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c3cee055de711a3abbb114da6ba48cba/rekutojabufukuz.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/78307550272.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210905232733.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/65887775038.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/95892996863.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/17249738549.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138a356d3879---21792494575.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/mujizuvunisel.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/letiwadarelanovaruwarew.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/93827101375.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613895e4a794d---10519560549.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/rujalupabu.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/1765735389.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/97091193080.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/pufigexuludofubit.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/55248397325.pdfIn PDF document text
    • http://thegioioto.store/upload/files/duxibedibipalibuzafixop.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_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 18588 bytes
SHA-256: 5d7f7977eededc85f8924e57f9a906832e7fbdc72be7f82af4c9236f5b9e8f47
font_02_sfnt_off000143b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B4 10624 bytes
SHA-256: b956f4831367833f674125b2444a0a080b81a80937ab239b21b936f82358f9f8

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