Malicious PDF — malware analysis report

Static analysis result for SHA-256 47356e4960d70862…

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 04:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06b909a2ac0503d0d8d61dc4ef674d12 SHA-1: 1930ba5cca35cec93300e9bd0754f4be745913d9 SHA-256: 47356e4960d708624a23bc60db95e538cb698457d7b1298f4d397578814c344e
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with high confidence. Heuristics indicate it uses embedded JavaScript and presents a visual download button, combined with advance-fee scam language, suggesting an attempt to trick users into downloading further malicious content. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/20799178950.pdf
    • http://dpsnowodworze.pl/userfiles/file/kegaximemo.pdf
    • https://webmenuplus.com/images/file/xibuk.pdf
    • http://pol2-simf.ru/userfiles/file/kajumaxi.pdf
    • https://mygoaltv.com/ipp/images/uploads/files/81922703579.pdf
    • http://wohntraumgmbh.at/xupova.pdf
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/xupotajubalubugajabita.pdf
    • http://guoyangmoju.com/userfiles/files/ripiko.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/xudorimirupi.pdf
    • http://nepodoshlo.kz/ckfinder/userfiles/files/kejanipafexi.pdf
    • http://elesi.eu/fichiers/files/misajuwobatimalovusebawon.pdf
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/32451414381.pdf
    • http://ranahytta.com/ckfinder/userfiles/files/46379609267.pdf
    • http://hotelniagararimini.eu/userfiles/files/92352613701.pdf
    • https://o-dance.com/upload/files/74079318999.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7a03ad53e2fb09744a6eb113c4e19e1e/94399883809.pdf
    • https://beldaoyun.com/calisma2/files/uploads/ferojunosegigovatotado.pdf
    • http://szzxwx.com/Upload/Upload/file/202191522297036.pdf
    • http://hmed.vn/upload/files/7962995123.pdf
    • https://carcable-bg.com/uploads/pictures/files/veporaxirejesipobopuzab.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613780f65bf8c---93806653351.pdf
    • http://tidomusica.com/uploads/files/202109190859325052.pdf
    • https://markmont.eu/editor_uploads/system/files/zunuvexunijurabutobol.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=firmware+redmi+9
    • 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_off0000d8e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E7 16792 bytes
font_01_sfnt_off0000f0fe.bin
b4a0fef58cf21bb04d6f1fdc4e730ec63b486d29040883a7b32206f37b98e013		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 10104 bytes
font_02_sfnt_off0001078a.bin
6a6f741a3ff323d74904e5fe9a72bf879c5358d53680151030fc1fe94afa0010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 18032 bytes

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