Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67d18037620ec2f…

MALICIOUS

PDF

88.0 KB Created: 2021-07-31 18:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f0627902e4f368d102e66a26ff1c8e27 SHA-1: d28b7f6098369a5e8c7a04caaf7edd9e04fde4f9 SHA-256: f67d18037620ec2fac02710a94cb4867a1e032f3dd1e1de7562c8b11257de07b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan. Static analysis revealed numerous URLs pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness, supporting the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://crewmak.ru/uplcv?utm_term=how+do+i+get+my+iphone+to+recognize+my+airprint PDF link annotation
    • http://vimar.ua/userfiles/files/wabuxewotur.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9f475c9f5---nifakufugod.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/xujani.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/pewimuke.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/wunerasedut.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/pivojonixasi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/6ecdpgtk0kidba7bghlol7teqs/13741640173.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/peniweguriruwatisawiso.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/timabonapu.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/50098775769.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/xeligutokoxotadup.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/85751902263.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/93248064680.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/aseokbrr49vb5be3o38tg6o8i0/wubagiluvotivobon.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/pelotapapefufa.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2b2160ccde3108c4800ffdf09c87f4a5/nokaxafavutenob.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/venotiwokop.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/nivekoralidogup.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9be61f116b7f68239d2e7e5a01968bde/70602529498.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/fezaxoxiwixeregudis.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/956e0b996c3eb51b032e82dfb9e1311b/63312255873.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/48766017812.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e0a3af8b3---munokokanozegevedimoz.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609843f35bb21---figomupogimapi.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_off0000f2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 16800 bytes
SHA-256: 6c54a939d0a9a3a52b9f79f1f2014113b88e2b43cd980bf8dcc3bf1f82a8b941
font_02_sfnt_off0001368d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368D 10996 bytes
SHA-256: 57c02ee6490883e65a2882c6039f736329c16fa6e6f12e19ac496c404b0419f6

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