Malicious PDF — malware analysis report

Static analysis result for SHA-256 29295fb4e555006a…

MALICIOUS

PDF

68.8 KB Created: 2021-09-13 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e28f1578351d38a993c34e2a58387390 SHA-1: 8d4895e9aaf4c0e28c86c74a5e84cd26840c163f SHA-256: 29295fb4e555006a8b9859a428e89211d412d58ad5021156d184022b8c5429ed
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains an embedded JavaScript stream and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of JavaScript and the link farm strongly indicate a malicious intent to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=free+robux+1000+real
    • http://longarmacademy.net/fckeditor/userfiles/file/58603463608.pdf
    • http://pomocnaukowa.net/Upload/file/nuwirumidewuzari.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nunevinefaruxuvevepa.pdf
    • http://uralinteh.com/uploads/files/surusedater.pdf
    • https://studyhalltracker.com/files/file/vulufafuwejofamigibarives.pdf
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/35511638311.pdf
    • https://vicareyou.com/userfiles/file/99328456916.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161355d9503f6a---kagemosif.pdf
    • http://studioambienteterritorio.it/userfiles/files/17651195332.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/rogukunikojexupomufim.pdf
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/91386025863.pdf
    • http://crm333.com/documentos/file/tajigefomasujulikig.pdf
    • http://www.pattyn360.com/upload/forum/files/zaxufemukujalenerabofu.pdf
    • http://karinameal.ru/imgdish/files/fidisimum.pdf
    • http://medrea.ru/upload/files/58027912099.pdf
    • http://king-pro.com/userfiles/files/jejoj.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d65d9a0e2dc74aa2faa5f7128728d272/88704724018.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161391ced62b28---26904209535.pdf
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/wemifosurejezidegikilod.pdf
    • https://ltes.tw-goods.com/UserFiles/files/81209551482.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e68aedf92b54c25ca6fc089fa2effac4/63060453822.pdf
    • https://ducthai.vn/userfiles/file/32169555946.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/08a4560e451de10d3df62d81b23f7a70/xumevajufo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E4 16792 bytes
font_01_sfnt_off0000cbf6.bin
9623ac79e1f437ad1a9595bdb48627558d2072a3d250dd40540e874de6832ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 14220 bytes
font_02_sfnt_off0000eeff.bin
47a93ab64a026b9b5bba4a2d31c0c079f6ee2aad11f09e884d44a367c0182f16
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 10132 bytes