Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab4e0185891d533…

MALICIOUS

PDF

68.6 KB Created: 2021-09-25 04:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6fbf022b889788e72fe814f1364b8139 SHA-1: 551e1496685bb1644fbcef058fa2735eb9ba9258 SHA-256: 8ab4e0185891d533ca8d0d3ce232e5af469e045664d7bfcbed6fc6111b2ec3b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a phishing lure due to its image-heavy nature and numerous external links, suggesting it's designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://xn--tnqz8hz5cb8l.com/upload/files/digesa.pdf In PDF document text
    • https://felixtrail.com/imagini_ws/87298920250.pdfIn PDF document text
    • http://congress.bpv.su/content/files/files/23189504870.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/41357866998.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/94247997772.pdfIn PDF document text
    • https://cargotavio.ru/files/file/34912086419.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/90246082811.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/28822191899.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55688040051.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/xitilujoben.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/67264101776.pdfIn PDF document text
    • https://kawanmto.com/contents/files/27931588011.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/35074909293.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385707f0c7e---81891491161.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1991950775614e4fe9405c8.pdfIn PDF document text
    • http://boldogelet.hu/media/44454658862.pdfIn PDF document text
    • http://benetalent.com/upload/files/45409618434.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/filog.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/vulolovifalixoz.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/vukipo.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/tinom.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/petixe.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/56780956548.pdfIn PDF document text
    • http://poultech.net/d/files/nired.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/64152149160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=grand+crime+gangster+mod+apkPDF 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_off0000af4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4F 14344 bytes
SHA-256: c58ae04a9568fe68a0b44eb083b90358122735c1a6ffdf5443d535dcb3a39a3b
font_01_sfnt_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 10940 bytes
SHA-256: 90d6f7928e28f9315c6e332981b8c631bdc003bd23ef67a05b6b92ca6ca63ab7