Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba97e2376caefb4…

MALICIOUS

PDF

83.3 KB Created: 2021-09-09 00:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cdbe29ec18b7342c8e8086a92640b65e SHA-1: 9b9018d0ce75e886da18e2747331790d3e5dffc9 SHA-256: bba97e2376caefb4d79753c7c9559b2b293d051f2f79e060c76f52b102bd44b1
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to files on potentially disposable domains, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • 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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132069f6db52---sawotuzowopezawijofat.pdf In PDF document text
    • https://duel.pl/userfiles/file/40004530178.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1630941673.pdfIn PDF document text
    • https://wildnaturetravel.com/File/14704906658.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9390259b6---xiwejinekedawewarigomomed.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/kokulududiw.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/713189385.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/8981c095a2008dd64085dfa51a548db2.pdfIn PDF document text
    • http://inistor.com/ufiles/files/tifubo.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/94647311565.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/28341460379.pdfIn PDF document text
    • https://kermanrooz.com/img/files/1620541865.pdfIn PDF document text
    • http://dgone.kr/userfiles/file/20210909060415.pdfIn PDF document text
    • http://ijfbn.com/editor_up/62324576143.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/94455590165.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/zixokizefifa.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/dagumexezalofirozofosis.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/23438047541.pdfIn PDF document text
    • http://kasargod.net/uploads/file/rezika.pdfIn PDF document text
    • http://uhorder.com/upload/files/80288593702.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/xokif.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/wodafimebifukasuwezofi.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/doxuruvokituriwadepu.pdfIn PDF document text
    • http://hrudolf.com/userfiles/sapizodijopukipugopit.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/lujuleduvoluponuma.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/1052979807.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/12318013825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+cheat+in+pokemon+go+battle+leaguePDF 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_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 10960 bytes
SHA-256: ea5086c530d6c05398f46282fe80967b560cc313ef3f5f0615328b98714ad506
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 18380 bytes
SHA-256: f67320c9b58bdc71c60a40ea24158ca5e4439d9e4d798e1174f00c784d0280de
font_02_sfnt_off0001252b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1