Malicious PDF — malware analysis report

Static analysis result for SHA-256 336ddf9ba9e5ea74…

MALICIOUS

PDF

169.5 KB Created: 2021-06-27 19:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20b90ed9aa623d4551ef5c28f1bbd8aa SHA-1: 61ebf050f96c388b90fdf879252574c2031093a8 SHA-256: 336ddf9ba9e5ea7409226aa49a093913ba84f817be51fb512193087d7efc4cdb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress sites, likely intended to host malicious content or redirect victims. The document's structure and heuristic firings strongly suggest a phishing lure designed to trick users into believing they are due a prize or parcel, leading them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

Heuristics 7

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/uplcv?utm_term=the+end+of+utopia
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1caa05dcfc---ruzarazepogalomavepub.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/a1e4987410df91761934c3c87081d414/pukofazufurivoxovewogo.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb844aaaabe---43851623815.pdf
    • http://niezapominajkowo.eu/userfiles/file/dazuxarujekoboluten.pdf
    • http://kassa.pl/userfiles/file/21594620622.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f96c3707cd---30158786580.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/28d15875f16830a82ca4db81a5b14ec2/vepinelavumexe.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c471467818e---kigorofajefufabajevawi.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2bb09e326---22699653416.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cded2c8afa6---nivujokutuw.pdf
    • http://donateagift.eu/userfiles/file/fevakufirimadatumigoli.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb1a3ea259---zujazoriwobaxi.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/da856438db72d30e0071b58f8d61a638/wuvezinemilebuxewiretate.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dce8177f3---37886593663.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609167c309e42---ruxejoxodexurukaxo.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceaf9b7739---67724221751.pdf
    • https://alatheir.com/atheirwsfiles/file/kelasenejexubudevaxomisak.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9da7be16e0841a7bca33822d3c0f5120/64027485995.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608617c78b4e5---95487034549.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/15cc4ae49a93e9e0e426791433d580cf/24985733999.pdf
    • http://jakpaisanestate.com/images/upload/files/febudav.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/81cc5acf01ef3352f53a59638af7c91d/41276200981.pdf
    • http://tsrmmessina.it/userfiles/files/95518677703.pdf
    • http://asustainable.com/global/file/73366009624.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/j89gpt11n0ivvc6841i04ka65o/43100079486.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/77cd5fba9f1f9ffbd8829c4c7238ab51/84402080879.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7a7e8917---nadawovik.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_off00023a2c.bin
0748bdc29b5c81cfa43ba6db6f7852d32d4ac23302cc4592f384da5ad976c7dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23A2C 10344 bytes
font_01_sfnt_off00025169.bin
bb7d8bd22011d40aa3c5da549b18414272e6431b8595673fc79421e256af487f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25169 18120 bytes
font_02_sfnt_off0002802c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2802C 16792 bytes

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