Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee121c25f512bd06…

MALICIOUS

PDF

96.4 KB Created: 2021-09-21 21:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 986a5cf696ae68fcde0b5761842cdc5e SHA-1: 8671e7fb93ae7835894abf7e333fd5e605534a4a SHA-256: ee121c25f512bd06fdb6e3c7c4e2c0ee6c458a4a9963487c93ec2ede27b7a226
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads. ML classification and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external URIs, many pointing to disposable domains, further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://uralteplostroy.ru/content/file/kixusifewin.pdf In PDF document text
    • http://aktifithalat.com/resimlerfiles/fovamesika.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/81842485577.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/tilumobowitafadukut.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/1354241461.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/91d88456d35da7b2817ecdaa855df8bd/duronemumebub.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/52280433253.pdfIn PDF document text
    • http://change4best.ru/upload/file/torotugal.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/73878405615.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/92874707720.pdfIn PDF document text
    • http://askort.pl/Upload/file/tokewebodejoxovabazok.pdfIn PDF document text
    • http://freestyler.cz/img/file/4928756685.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/30660305940.pdfIn PDF document text
    • http://sinostandards.net/upload/files/51175977404.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/panerilijamefite.pdfIn PDF document text
    • http://linker-apps.com/files/wumufupawafenase.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/61901037290.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/sodesumifetosat.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/41962627282.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/vulariviwekesinibajama.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/61122468087.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/24086187261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mrs+dalloway+online+pdfPDF 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_off00011244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 10588 bytes
SHA-256: d608c321f67fadea5cf430593f7177df3b02f81e97d897b6d76cfbb53edf8122
font_02_sfnt_off000142a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A9 19100 bytes
SHA-256: e9c51a4319a9e2f1f0e3f50df122161c31114467f2a49c5a0800c5d9282a595c

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