Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c74c9b72a8552e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-20 18:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ab651cb99a6f85175c9d28766ef40dcd SHA-1: 9481dc568673002a03c8830690bb5a24abad9c40 SHA-256: d6c74c9b72a8552ed1e3703fd7f73088bcc186e3bbcf8cfc57b6fa7b90565ddf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, suggesting a link farm or phishing lure. The presence of a 'Download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://srmtteaparty.com/uploads/files/202109021806319712.pdf In PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109092134596290.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210906051604.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/81424545764.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/47686613508.pdfIn PDF document text
    • http://mopron.ru/upload/files/89831064034.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/guwereralelepop.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/50036436711.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/5775007540.pdfIn PDF document text
    • http://azizolace.cz/images/file/piseliwumokisadeluja.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/feduximadatudebumutox.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/mojudofofofudisigoduj.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/90925069358.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359a03aea0e---62206169109.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/64604110041.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/82314061850.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/mefodeletug.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/mezovuvojinoxefusow.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/jejorazinile.pdfIn PDF document text
    • http://markone-tools.com/upload/files/futekivomewulameb.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/26c3f42a6d9b4f24301e5f11198de8c6/fikilorukidis.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/nunuxij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=vidmate+versi+lama+download+laguPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145fc08ac922---74752271485.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_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 17192 bytes
SHA-256: 4735d68d2fa8a044953a75ee5f8b97b872aecc8b56053ba34da09ffc1bf7dfbb
font_01_sfnt_off00011429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 10812 bytes
SHA-256: 5bd8665ca59b49c7bc88cccb868cdd77183a92dc75926499b7f0b213b24b7c29
font_02_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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