Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f8114d8672beea…

MALICIOUS

PDF

85.5 KB Created: 2021-09-17 00:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc629552599810db84c02507e2e4f407 SHA-1: 0e4afc42f7f407a511c67a38fd5afeab50231acc SHA-256: 03f8114d8672beeab821f6e222af97a7029d5ff573ccd29e8f8549f300130911
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. 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. ClamAV detection and ML classification further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://landpas.pl/upload/file/58820304995.pdf In PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/gadilovov.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/jepodo.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/58383508746.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210914185430_8tbusn.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/nowotesuwifomelotizi.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9959970701c649a277c20ad4d638c92a/jewulobit.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/10579435392.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/66745970924.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/zogebasolotigomejeze.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///pigixa.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/zigojiduwigezubomej.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/kuritutogovefejod.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/wawutuxanusigegowadep.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/jakujef.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/jekaku.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/xafironudozejare.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/niruzemuforir.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/60775164212.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/nowopitodapibojifiruf.pdfIn PDF document text
    • https://solturism.ro/images/file/24762125735.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/buxajofizakav.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/53815599355.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/jowivagototewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=superlife+darin+olien+pdf+freePDF 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_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 10400 bytes
SHA-256: 0630dde11474af06c8f37178313843f5f5c076d6fcd4731e89c4f941258e630c
font_01_sfnt_off0001015a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001196c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 18044 bytes
SHA-256: 174e213d128c2bb37bd93ecc94a1a261eb4ee07538e08ec2fd4f69f6ed78fa78