Malicious PDF — malware analysis report

Static analysis result for SHA-256 b704af3a06970d4e…

MALICIOUS

PDF

85.0 KB Created: 2021-09-04 11:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7111885303dc4322c0ae1fa0f15b5d7a SHA-1: c80cf74effdb3a633a6aa78b66720b07f0b5eae8 SHA-256: b704af3a06970d4e588e3feb2ea4656884154e13392227e1be65d433b983224c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. Heuristic analysis indicates it contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely disguised as a Cisco Packet Tracer configuration guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/e99pihrsm91db3bkj7n6u2s427/29550700745.pdf In PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a867c6fb8---kojixafarara.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf9f9c2eea---43141334780.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/38127986682.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c610dc88b01db6240b482f4255ff2eb6/25371960658.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0085675beb---xoxafutobifiruwipoxanuwi.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/34474767.pdfIn PDF document text
    • https://norservis.info/files/files/89490639067.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0871cd9cefda71dd3747b2dc54be8180/69310664881.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e25db5ef575e52d165ced6c6295c63bd/tamiwizubunumopasulirad.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/90f1f0749403d1df9e966cbed5e1bcb3/kalufowurevigoroniwimi.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/222be86e65bedd1774cef4f8f0b2fbb1/zumotijutukififeped.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/66400628827.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87e7232be8---vaxejubomux.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/884tei7n65imkf07svcg15su8h/13564013110.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/87896587937.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/8907920231.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a40896085a0---tuduwuzeteziwijasutuzoxox.pdfIn PDF document text
    • http://contua.org/userfiles/file/99053305242.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/fubuwajedikunulituxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=configurar+switch+cisco+packet+tracer+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4
font_01_sfnt_off0000d269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 22720 bytes
SHA-256: 64f6c03f4ee26feba07e68a714d7f6942bcdb0780697244655f5e6c3e6521bb1
font_02_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_03_sfnt_off00011344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 11164 bytes
SHA-256: 7c052bd18322246e6c9fdf15d1a3c653b41760830018dc3c0960862fd7a54a83
font_04_sfnt_off00012d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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