Malicious PDF — malware analysis report

Static analysis result for SHA-256 7664e62981675dc9…

MALICIOUS

PDF

85.2 KB Created: 2021-07-03 04:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9e7c6c0e184cfc0c3b5ff9e52b3ac43a SHA-1: 9944afa6560d205208014fa12f8611a6297fea43 SHA-256: 7664e62981675dc93e2475ffa59ba02b2d24c176af12bf8bfbeb54bd6bbe3d54
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing there are changes to payment or banking instructions, a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to lead to credential harvesting or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://girilawfirm.com/content_files/files/jopegilefepomebuwoxawexa.pdf In PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/f93a890aff1d000e37f47685f116c60e/mukopimo.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3b9bc558519edbf9520a403bb39dacf7/woxosabakifevofofuzaran.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-2/20210702104626841275.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c0cf37507---90747374220.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/48q1sj6kqa82r91qje94s87os8/92257335066.pdfIn PDF document text
    • http://riph.pl/userfiles/file/1568415089.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/kacbsu5sr2qaitub4r3v24jfc1/jazadulufip.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0a1eb238c---wuzenololubimulaxe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/50fd25277a62c73be2155463b407ad61/69609780730.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/koruzedop.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/5fc077fcf0a8f9078dc0429894dc1092/4142781856.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/jaxixujofofuxijolotojojas.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/xatisebokadaliv.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/52165816937.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/kolamokefek.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/90282772977.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a1c016fec12dfc38df0ab5909e9d0120/vetabaxomamuderaw.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/roxirarolivolekadame.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/jekapivedo.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b65212ae591e218a1d6ae18ff378ab4/fizajizomitux.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/87c721fd5393e184843b6b2e79fa9a37/romodaxexowasebep.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9aaea7ff4---95401115383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=examples+of+suspicious+transactionsPDF link annotation
    • 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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 16208 bytes
SHA-256: be9fc896ac432e58348b9643d11771cb217d77c89ad0b8037b7267af39a3cb26
font_01_sfnt_off000116c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDD 10828 bytes
SHA-256: c95884807d7a1af290ab5de9a9ff10cf51527f598bf6efb2b52d85a4c56af584

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