Malicious PDF — malware analysis report

Static analysis result for SHA-256 4356416560894a51…

MALICIOUS

PDF

651.4 KB Created: 2021-07-03 12:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df42d57c53667b85235cdda2f83e7088 SHA-1: b61fbf80f6bc283046f346edd754f4e572c3debc SHA-256: 4356416560894a510c0bb4e508961561c9b955774362ef47945f702bab35d354
166 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries to entice users. Several URLs point to compromised WordPress upload directories, suggesting a pattern of hosting malicious files on vulnerable websites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6487

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.
  • 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.
  • 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://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/mcncang9vto9igik12j83h7nl3/91562961328.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fe67372b---78932660223.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160752d2dc7b0f---59956731003.pdf
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/76570958912.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d74f2da711b---jakekelurogisagotet.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b023f2e54d8---42921051830.pdf
    • http://firegallery.ru/img/upload/zagomegazumu.pdf
    • http://files.ibiza-ferien.de/file/38402520758.pdf
    • http://dok-vo.ru/userfiles/file/73147868812.pdf
    • https://keongracun.org/contents//files/jitenelovujafuwinepoxafo.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/4982032000.pdf
    • http://altelaw.com/uploads/image/file/jigoxasugatet.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20215112014371010.pdf
    • https://mszukam.pl/dat//file/68048582313.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0545010c5---48722900100.pdf
    • http://botosani.ro/img/uploads/file/10749948462.pdf
    • https://noihoithanhtuan.com/media/ftp/file/9812155819.pdf
    • http://galluccifaibano.com/userfiles/file/madakawofo.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/449d5529ead3fa28934ba007ec1c9a85/62233708021.pdf
    • https://mimpiindahsatu.com/contents//files/9080741298.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffe963c394---lumelosajowifulavudepe.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/d4995755b586fdc247cbaffccc78ae42/guwolikuv.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/q0o4l35hj9i86hlg782ot8cpq5/lavejamonezokoma.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=treacher+collins+syndrome+facts+for+kids
    • 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_off0009b803.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B803 16792 bytes
font_01_sfnt_off0009d026.bin
8ed45916a5c42c8e729979a039fa014e3e5faa8a475dc95f108cdec9294c7ce2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D026 10908 bytes
font_02_sfnt_off0009e946.bin
62064919d11b209c673bf61790e5c72379a73a289373a7ac377ef96215c21193
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E946 19760 bytes