Malicious PDF — malware analysis report

Static analysis result for SHA-256 1404af950157742c…

MALICIOUS

PDF

87.2 KB Created: 2021-09-04 06:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d63433b7eeae8d64de10c6554a6ced51 SHA-1: 0e162ca494cab34691d9b09c68041d87b33a9a13 SHA-256: 1404af950157742cc7bf6bae0bc0a97484cff134a114d93b91406b31974edd8a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document's content and structure strongly suggest an advance-fee scam, luring the user to click on embedded links that lead to compromised WordPress upload storage or other disposable hosting sites. The presence of multiple external URIs and the nature of the lure point towards a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://irlanc.ru/uplcv?utm_term=pradhan+mantri+all+yojana+list+in+english+pdf PDF link annotation
    • http://sellmysayarah.com/userfiles/files/wubeduxoje.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fa017afe6f---90541018017.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/gofubokilurixet.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210725134732548792492.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/xivuxutunupu.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/83716468327.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/6077817619.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c11782756c9---79057725161.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///49908425577.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/re2i7cvg2k4gtt5g2cqe85fvcm/42301549744.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/73440492716.pdfIn PDF document text
    • http://minerva-collection.net/files/files/31448716419.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/mawobebejuw.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/78c1b698a1f2fa99f6da3ab0c127d201/67835268385.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/warugamowudezitokewo.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/laxiresewipezusabunep.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/zogoxusividasufonubikili.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ecda648e7---31022812797.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5d29ed9d7b373c9a2d8c1dd89671a879/rifijitutabizorotosigux.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/37417732535.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/45876350024.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078e0bb9e7e1---nemixidemagodife.pdfIn PDF document text
    • https://birotex.rs/images/files/32921455500.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062304320473499.pdfIn PDF document text
    • http://kingnature.ru/files/files/30731614551.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/nerowomidonugele.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/22773630433.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 11192 bytes
SHA-256: a7cab4ba6601b146697c4db3c0d0dd2444b9bba7a5281c97bddf33c369c8fdd3
font_02_sfnt_off00012206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12206 17088 bytes
SHA-256: 3e2ff64c89e2da0b95069f4cef2744ea5366538afdf5277aee2c2cc2bed78680