Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce01d91eb96e4e7…

MALICIOUS

PDF

84.9 KB Created: 2021-09-16 02:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cec5d05b7c3856d9981c45eccfa1c101 SHA-1: 4974fe06d7ae86603b45fcfa3f255f928207f5b1 SHA-256: 6ce01d91eb96e4e73abd77ecd4e526153d39ab5e746fefb2fd4a4ebd8932c2d8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://mackyz7automotive.com/js/upload/files/2144394947.pdf
    • http://wingmanplanningdemo.com/userfiles/files/lusuzunejatomagozi.pdf
    • https://jdrum-music.com/uploads/ckfiles/files/solunesekubibuki.pdf
    • http://okna-dvere-online.cz/media/upload/upload/file/lodubinutojujubudez.pdf
    • http://zamgph.com/uploads/file/042354509324.pdf
    • http://placidlakes.com/larpm/uploads/file/rogoxapisemu.pdf
    • https://gulceoyunlar.com/calisma2/files/uploads/97910134704.pdf
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/tugil.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134551c49035---vikominomo.pdf
    • http://orem.mn/uploads/files/6448981801.pdf
    • http://noithatsah.com/webroot/img/files/fawef.pdf
    • http://swapnakoodu.com/fck_uploads/file/52747785106.pdf
    • http://cedule-plachty.cz/files/file/vebipeladexamolefigekew.pdf
    • https://webornate.com/viking1/uploads/files/38761732347.pdf
    • http://www.hermosabeachbungalows.com/userfiles/files/56119194360.pdf
    • http://restokrat.info/userfiles/file/1816409273.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/10282af3c326a1dbf9d81b78c6fa2cfe/53624117178.pdf
    • http://noxsun.com/jingkelun/userfiles/files/20210911003453.pdf
    • http://iwilldoit.ru/uploads/files/files/3748096086.pdf
    • http://baove247.org/upload/files/36206803824.pdf
    • https://dalton-english.com/userfiles/file/merasusalekito.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/kabogewonozofato.pdf
    • https://0286869143.com/editor_images/files/96811327411.pdf
    • https://cissud.eu/uploads/ck_editor/files/zotad.pdf
    • http://yuc-fac.com/uploadfiles/20210910000855.pdf
    • http://vencedor.coop/images/admin/file/penopujunezo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=lyrics+video+maker+mod+apk
    • 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_off0000e0ac.bin
dfd5430d7389c446fa5a52f49cc3915e5e2de03702618136efcbd233a6106485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 10656 bytes
font_01_sfnt_off0000f926.bin
380161cfc1a00fa701192a8a604d3a2b9feaffd8838a9692725edde603ee1504		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 20072 bytes
font_02_sfnt_off00012dac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAC 16792 bytes

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