Malicious PDF — malware analysis report

Static analysis result for SHA-256 2706090584cd3892…

MALICIOUS

PDF

72.2 KB Created: 2021-10-05 18:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 771da89d4e50d90a166996b67b6108b9 SHA-1: 2f630da3b313872b1919a5b5201cd49f9bce20f1 SHA-256: 2706090584cd389239d1bb2458e74973ebbeda284471109b4f03644c854df9ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating an attempt to obscure the true destination or host a large number of lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://kirche-treuen.de/UserFiles/File/pegabufewumekibolabo.pdf In PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/zizabower.pdfIn PDF document text
    • https://atrax.hr/files/34953823577.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/ziwak.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/kalemodaxoj.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/75036799072.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/g0me0uehlch05r3pla2u9jlj7p/88404335195.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/83046751523.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/90359628896.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/bamuxaku.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/fibuvede.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210906154744.pdfIn PDF document text
    • http://donghotam.com/luutru/files/mizakosodesawakezoruj.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/wosiwisifenaravulalep.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/34290598005.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/99686997686.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/miboxeroxewusilibew.pdfIn PDF document text
    • http://espicycooking.com/files/file///42767129050.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/13758788723.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/nulopuxufikuketavob.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/33987642620.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/nurovozigo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/10692134086.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5671cb3e368c420557d460ea69642024/rasimotejuw.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/tazosatumoginububa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=painting+and+coating+testing+manualPDF 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_off0000b71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 10716 bytes
SHA-256: 5410212ce1c81c7bb0e729bcccb1d40d60a3a666317fdf92fb154ed422cbef24
font_02_sfnt_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 16968 bytes
SHA-256: 2a3b3ab9a7a21e80278a739a24a7da7f2f2b7245cb048d99c1be2375b657b7ed