Malicious PDF — malware analysis report

Static analysis result for SHA-256 6770bbc0720585ec…

MALICIOUS

PDF

218.3 KB Created: 2021-07-03 17:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0c9e9c411fca4c49b502c5e71c7ad41 SHA-1: 361d5f8e371cb77296234480fbe1b83df3b83e82 SHA-256: 6770bbc0720585ec02403d46618279015c0173b8dba606d2b1a7280c5213d9f1
166 Risk Score

Malware Insights

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

The document was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files, many hosted on compromised websites, suggesting an attempt to direct users to fraudulent content or download further malicious payloads. The primary attack pattern is to trick users into believing they are entitled to a prize or funds, requiring them to pay a fee for delivery or processing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210630005011.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/5074483545.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/92017165034.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb3a4ee39f---datedefu.pdf
    • http://wardwrightself.com/clients/863644/File/4067128461.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f17b0ddae93c867f1a0c54beb1d851a8/65419811326.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/02a6767eebdb4577a7dfc941cf59f4eb/wululaxusozeveveruwa.pdf
    • https://ludifrance.fr/userfiles/file/35990117212.pdf
    • http://haenuri.net/ckupload/files/xifawupo.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b9d8b5179---77837421307.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/bapvfam1n9tvo6b93csb5nlt0b/mumolekakuv.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c119a9714---13049789582.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/babfb5ea307b47ebcb5d20bff796ad45/vofukimonilezes.pdf
    • http://absolutelyneon.com/userfiles/file/2543533044.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/215aa4e73f257f9d449cd6057fec1f47/suzovapuzeleluruxisag.pdf
    • http://zwickerfoto.hu/_user/file/wodikap.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed6ec258f---63295963384.pdf
    • http://decaiyun.com/upload/file/210619133808449185isumcn1vti5h.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160accd84b7841---71466590729.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/1572d0a5e28b7c1381d1cd8f9694fa9b/lizesawipofuxizemamadabow.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=lil+abner+cartoon+characters
    • 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_off0002f522.bin
8d7066a7d35a2f3433f12af6a6e290d112a795a4b849460557cc6f16a5cb8b05
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F522 20740 bytes
font_01_sfnt_off00032bae.bin
97ae1198743528ea70b8c023b0d1ca9125f3c11005c7e2cf69f1ce8126ec1b9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x32BAE 10424 bytes
font_02_sfnt_off00034339.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x34339 16792 bytes