Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ff60c2be39364b…

MALICIOUS

PDF

77.1 KB Created: 2021-09-17 19:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e22e415c2759b8351c22eee9e637c0b9 SHA-1: a1f8965671697b8737137db904cebe01a1f685fa SHA-256: 29ff60c2be39364b2f396bbb34eb6db2a8c90a9d95381c68b90a42cbb360640d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution attempt. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=app+lock+deleted+video+recovery PDF link annotation
    • http://farmaciafoglia.eu/userfiles/files/19226837750.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/rafan.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/27064372686.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/64693434660.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/giwij.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/33330145608.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613427f6acafb---61000519085.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/xitudujejapezifigupunadex.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/64564476.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/21733036862.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/lsgq0brm62qt16uoju0udvt213/46340829220.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/46081629848.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/wuvidileraxivuzabed.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/xiwezovazivunavevojoresam.pdfIn PDF document text
    • http://tchid.net/userfiles/file/80998054438.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/fojelijezetusilezal.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/97594842707.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/detelebekowexapofeke.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/47701942925.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/21712797693.pdfIn PDF document text
    • http://elementyzlaczne.pl/media/file/kivesuxezepebimixikogiz.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/valosegesigitiwuxurisexem.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/75454960607.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210904_54F3074FE1A8534A.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/ruburi.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/dutimavapawojulifidepotok.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_off0000c8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 17920 bytes
SHA-256: 53319c7df06bef1c6820837cd683e1848e33b24cf76f1f19444e70a871e73398
font_01_sfnt_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 10324 bytes
SHA-256: 08377163236d62d9493661192b5f6727b29d5fca0d2b85aa6dc0110ce17c2620
font_02_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1