Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd80911be2e1e0aa…

MALICIOUS

PDF

265.9 KB Created: 2021-06-28 12:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d77bf60e05c361eeed7f5e4fbc467357 SHA-1: 95e294d4cfeb9d0741d12952528f69d5e3eb4901 SHA-256: fd80911be2e1e0aac9ac0d12eced5f95d8df99f7cb045d0ea6ac87e40c8b84d9
166 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://aduanaldelvalle.com/userfiles/file/25865973597.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/037ff440f6f00f29027ae3cf29cec84f/22954582639.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ac319e61---48608819670.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acab67938d2---vudorikejeneju.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/eeaaa7327ec655051600bc8b60991baf/1973967265.pdf
    • http://adria-ex.com/50176960467.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/vko2ri4c7sdmjlfpfg100706k3/11619711889.pdf
    • http://alimentosldm.com/userfiles/file/fixenimisixirativusa.pdf
    • http://teplospectr.ru/images/files/fagevoraboxizu.pdf
    • https://mangonebike.com/uploads/file/dupil.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/0369ace26ce40de08e7c9d364446afca/73596068593.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/ec9dd7014ce83bda8c3504a9dfc7981d/zesal.pdf
    • http://chocoenglish.com/_UploadFile/Images/file/6660856094.pdf
    • http://naszymsladem.pl/upload/file/nitupatinikidizusepafuded.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/08d44af7e3312655a13c3d17b30d58a5/zuwegunisatedete.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5d9f4ab9e---44725281035.pdf
    • http://jmdfhjl.com/fckeditor/userimages/file/pobilufe.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160706af9f2223---50329785227.pdf
    • https://walkandsmile.com/userfiles/file/lowogakowiraxikef.pdf
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/nuzimaxunodifokarowinos.pdf
    • http://gorisum.net/fckeditor/upload_file/file/kozekulikep.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=industrial+revolution+1760+to+1840
    • 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_off0003b116.bin
5623df5289da8774d924ee5768e5deb152021aab080208c21fbdb2d682b0cec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B116 11036 bytes
font_01_sfnt_off0003cb03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CB03 16792 bytes
font_02_sfnt_off0003e315.bin
4b176a696cfd256f079f573482a4cbdc0808316e0b592bede8114e9199123184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E315 21340 bytes

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