Malicious PDF — malware analysis report

Static analysis result for SHA-256 b029a436c423eab3…

MALICIOUS

PDF

71.1 KB Created: 2021-09-08 05:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94fa4f47662df013e76fbd6bb922aa9c SHA-1: 0f2112d2e6952297d63fbcb56788f350f623034f SHA-256: b029a436c423eab35f969b62a97623eb8798f54a0db9c396ae1af71a3dde856a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. While no scripts were explicitly extracted, the presence of compromised upload links and the overall structure indicate an attempt to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/39cbc3e4ebf70e2f9ab9423c7375f72c/gozofoxidijo.pdf In PDF document text
    • https://apizf.org/public/file/91831379575.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6e2e651b6---66876351980.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/r42835e69qcaab6ic59sjfht4b/83961130077.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/jaduxadafidavomaw.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/jilijoxadokugosizaxitoz.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/8029731729.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121cac8c18dc---20014281374.pdfIn PDF document text
    • https://sce.tw/uploads/files/60cbb0b06781f.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b88bc38c921---94998505893.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/66145929849.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/35176213200.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095eb7773ef6---bovubavunajifej.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/bikoza.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/39077510164.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37471c651---38194312923.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/fazarudaxiziriwidavuwuja.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a811fd596af---82455203469.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/gosedejepekoxelis.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa40aab189---47709715807.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210704103106.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/merozesuxan.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/c1li2a7gho72vqogf6khvn5k5u/77558046581.pdfIn PDF document text
    • http://allycatering.com/userfiles/19581388747.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052619004838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=blueant+bluetooth+car+kit+manualPDF 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_off0000b6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E7 15668 bytes
SHA-256: b0e84d1dce9331ede54efefed3f5d8fc2dffddb29d0c49a302e318e943412e2d
font_01_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 10712 bytes
SHA-256: 65b0deb907d050e2c8bae921ff00d56b4396b33689357c89a6230a218e6c1c1a
font_02_sfnt_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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