Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c54949e56371227…

MALICIOUS

PDF

87.2 KB Created: 2021-07-22 01:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 71f880d713e5a3a2acd06662ee18ef6f SHA-1: daabf4c9806f83076843ebf1d89fa975ff88e3b0 SHA-256: 9c54949e563712274fa4d768fb9aae1f6e99ed7221921b55a33061143bad2dbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly implies an attempt to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2348a628a---71117443266.pdf In PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5da2d6c19f4e60b2586730710ec0775c/pedowulavevapitipu.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/17991536369.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/falijonapotuzipovuxo.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/13933c1dbd47ad1531aad183cfc740e6/33258575887.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/aa7298fcfe62bb620f3430859fdc8070/roponuxokozobefam.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d01b216aeb425e565f9deb304296df38/3050685393.pdfIn PDF document text
    • https://postelezmasivu-plzen.cz/ckfinder/userfiles/files/86195834152.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/werojes.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/40782007275.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bfa583479---26888528263.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/butofojapakulatotin.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d235123675---16305309976.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/zenefokuguvetefafegi.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/xatoboxa.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/31396512703.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef166ad6b---nilasotagegiganotelu.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/novibemobiwejakovurona.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cd98a827ceb---tazaromijugelagerakubusib.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/t80ks15mljj8836fg9rs9vjh91/duzoxesulipetusakidewawi.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/f3cedf98fac3eeefe9df5da672f47b2b/18964625107.pdfIn PDF document text
    • http://chapelguild.com/images/usr/54636448203.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/zelivipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+year+of+billy+miller+read+aloudPDF 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_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 10568 bytes
SHA-256: aa0684281d9e273366c34cb0671dd9c2ba1c892773356c59d5be375c0a748b7b
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 16932 bytes
SHA-256: 795c5c13e11c6707a5454a8730a2833abb9887f789fa902f11356a20a72e4c10
font_02_sfnt_off0001359f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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