Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9ce25d04960997…

MALICIOUS

PDF

92.6 KB Created: 2021-07-01 18:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4343a5434613ad8e6c6fd78d33577e2d SHA-1: ae5b86d6dd0dee057dbbf826708571d7cc37818c SHA-256: ae9ce25d0496099798747a23404814db72e931f45ad617ad01cfde1dcdf2dd94
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites, suggesting a phishing or social engineering attempt to trick users into downloading further malicious content. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the heuristics strongly indicate a scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/98cde99fd37b7c9720a5b218b737c922/nojitavakawejomoveteribe.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2346d174b---10351041383.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/790369b23a98d062044222a511c66f44/fatutojobusa.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/98707057887.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072258980a9e---90161310034.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d5b288722999f308db2ddf34003d0aab/59808056879.pdf
    • http://travelshops.pl/userfiles/file/penatotag.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac52062e0---93084011484.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa2d048e9---rumonexerelizojuj.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160776662f05bc---39815365464.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/37048ef203af67d784a37557cacde43e/butizomamuvowumeno.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/pagazijiparomabaz.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ci6t1ebuiaspgad24e32pnn5g2/20248920125.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8cb2d1e28---99751049938.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba49efdc9cd---xoxikeworu.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092edb9abb3a---47355742451.pdf
    • https://szekszardportal.hu/userfiles/file/74243800225.pdf
    • http://stoewebdesign.no/userfiles/file/govovebumulebelelaxugin.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160781d2ac1dbf---21026169792.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/fc1b5329ca406d8a51e1b3bf1037f924/97184260941.pdf
    • http://aqs-group.it/userfiles/files/96201456785.pdf
    • http://furniture83.com/upload/files/wodetududisubapirodofir.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813cc9bf54a---folanadakag.pdf
    • https://liantoong.com/archive/upload/files/81776127959.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f0f89191ef31126c5b8bf04939286e63/52999508890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=boxing+star+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeac.bin
03870aac9d7faf13da082b8362fe1d53acddd1c72d128bd2ef62f1d5e6195c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 17904 bytes
font_01_sfnt_off00011dd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD7 16792 bytes
font_02_sfnt_off000135ee.bin
9e8f4aedf9278f1ff9e6a33a80c1b7cc6700642d56d55d8975a49ede55b50c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135EE 10496 bytes
font_03_sfnt_off00014dff.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFF 16092 bytes

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