Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c92f844f0b9bef…

MALICIOUS

PDF

84.9 KB Created: 2021-06-28 02:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73014a32e79a1470a2511e228fd2530f SHA-1: 021057f9fd8792afdba42a5ec2be216888dfd9ed SHA-256: b5c92f844f0b9bef14b25a41c57d6756ee669cea05a32fea8bb4a0aead545912
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://csptech.net/admin/userfiles/file/neluvufivitegezemevud.pdf
    • https://aucordechasse.fr/vosImages/39377833822.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/vr2dutcalr7tqltda2hui82e9a/5857450534.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/e252801b773485b28a0818097c7906c0/suverudoz.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160847695848a7---labebojimumemafima.pdf
    • https://btcauction.vn/hinhanh/file/dozabudut.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc1a38cacc---68238517786.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c753b97d0---16690266529.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16081e46d9858c---67785751500.pdf
    • http://dansecyr.ca/pdf/file/nixukapa.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092c1e091eaa---76795030173.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/9401d11d0eaf70ee39758cd0562d6f28/folabitasufagubopiduxuve.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/tkpv3ubkuvh5bh832g9lhor7oj/11726997481.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55a793ff51---bevaxi.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b89b11ad0---81946930892.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/f181a6b6423bf1456032429b520e3d0d/kejesopateredogini.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2aa14a9c94e630a362f05f5dabfada4f/28674589213.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/742f7060e49dee8de1a7fd5f9e15fc38/43157957033.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8sqs8k71onr9khsrboj1bhnkm6/1664219895.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/02t72et05n6urqe5lvhnb93df7/xopil.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b481ae444debb49d35f1b3fb9570de68/pezep.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ca1313e71e8510b751530ce3b19aa057/56615354960.pdf
    • http://alpha-th.com/userfiles/file/91509284633.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/rixejobavadebaxogamuja.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/07acb10ab1i5f0mfudo57ch112/15764203945.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=blood+transfusion+gone+wrong
    • 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_off0000e8e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 16792 bytes
font_01_sfnt_off000100f8.bin
ab8c64417c3c21756e09fa8978fae315a5462ea8dbc622db17ae7c74a34cafd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 17176 bytes
font_02_sfnt_off00012da8.bin
cf4201208d18352312325ab7ff937d9f06946c1d7a077329fdda40c07dc1cc2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 10768 bytes