Malicious PDF — malware analysis report

Static analysis result for SHA-256 7716bbcc6dc77e00…

MALICIOUS

PDF

82.0 KB Created: 2021-09-07 20:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9379f82e7e22b7bde6589093aabbacf SHA-1: 59e2fb68f624edaf7d3fec4ea8f0b8eadb14f6c4 SHA-256: 7716bbcc6dc77e00d1563371b6530722ad7a676490063eb6ad1fc4e1d993c259
196 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing lure, specifically a payment redirection scam, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It contains numerous links pointing to potentially compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 http://cdmatik.com/uploads/file/pazebozig.pdf In PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/22518775600.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/9906fff273446e32dc8974828d014a00/68528260986.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/40769583639.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070a9acab207---93815337928.pdfIn PDF document text
    • http://redsky.tv/userfiles/files/47474471780.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/menet.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6aaded5eee---vepevakowutofalidavofa.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/14bc0e9b85ecb272cbb69a0d2e6fd977/zezimada.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f9cadbe6d7486951e35d18779512de52/fapadon.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/vofezeluvaxopasaguzojom.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/xebuduf.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/bopufige.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/557678dcfd77d0c3b50bbe9c0a21e7ba/20482256089.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16078bbd8a3bbf---wexet.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3143445e4---nigamuxofapu.pdfIn PDF document text
    • https://85097781.com/upload/files/pimafirani.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/ji4gc2msa54erdsra8r409m1ts/21050477373.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/49224249281.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9d4bd01cf---bimeje.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/55906914699.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa113182b7a---4516825673.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/wemid.pdfIn PDF document text
    • https://aashianarealty.com/file/bukonuwav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=manually+submit+url+to+googlePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/81474906076.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_off0000dba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 10796 bytes
SHA-256: d61d144547b35ca6941e611834422745d5abad24109beee69a0a67d4b11bd2c1
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 17348 bytes
SHA-256: 11d76d79cc56205a55082409141fa5cfa0f97b14f131f2a720c1fc9e495854f5

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