Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d76c63c5001850…

MALICIOUS

PDF

84.9 KB Created: 2021-09-15 23:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7a03896a3d1a33bd937c5314f4a3f81 SHA-1: 9fd534134eb8ec6c34c6a8b4d2b8bc419aadd3c1 SHA-256: 32d76c63c50018508677c0a8d277a6f74fd8a6ffe0f147269c226203a5c1fe13
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed for phishing or scams. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is related to advance-fee fraud, likely using a fake prize or delivery notification to trick users. While no scripts were explicitly extracted, the PDF structure and extensive URL usage point towards malicious intent, likely involving JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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 https://inwebjor.ru/uplcv?utm_term=amazon+prime+hacked+version+apk
    • https://cs-nippon-cp.com/mailmagazine/upload/files/30127875136.pdf
    • http://konberdbio.com/upload/files/69811451986.pdf
    • http://rrbrentacars.com/files/others/33832768313.pdf
    • https://xn--atpta-nfb.lv/images/userfiles/files/nutiwitupagelanipe.pdf
    • https://ww150005.linebot.net/upfile/files/20210903162159.pdf
    • https://grouptm2.com/contents/files/rupixigaguxebefuja.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xirajufitukutadumalawabir.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16139640dc6d70---36626220837.pdf
    • https://hondamienbac.vn/userfiles/file/80930042664.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161326558ce9e0---busegazulux.pdf
    • https://adurucui.com/ckfinder/files/pedoron.pdf
    • http://pk.mo/userfiles/file/65493012480.pdf
    • http://h-n-s.net/userfiles/file/vuditunatuw.pdf
    • http://hoadondientu-ptp.vn/images/ckeditor/files/2994574392.pdf
    • https://doosradashak.in/ci/userfiles/files/31081148714.pdf
    • http://adance0112.com/upfile/editor/file/21358892826.pdf
    • http://gemmacapitalgroup.com/foto/file/pubesedemoseloriwevuvit.pdf
    • http://gowowdeli.com/uploads/files/71007130369.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/91776868255.pdf
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/jepiratibidapazepepa.pdf
    • https://roarmysecurity.ro/mm/file/68124461478.pdf
    • http://thai-apsproducts.com/file_media/file_image/file/lakuvomanatovifu.pdf
    • http://e1pl2.nazwa.pl/busy/fotki/file/48528492262.pdf
    • 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_off0000e50e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 16792 bytes
font_01_sfnt_off0000fd20.bin
ec8e5bc6d9eb29312e9937f19024799e8bc07613d5fe563dc727a4ba92b5cfc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD20 18240 bytes
font_02_sfnt_off00012cb6.bin
9673e344891e7e736142c7f6de6b07929820ac87271a97ccc498dd65af0d1077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 10836 bytes

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