Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f6c7d367f5c7db…

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 01:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e54e59431f5f41fb52abb376221b31b SHA-1: 843cae35f872bb1944d2742dd10d4159a5e86140 SHA-256: 60f6c7d367f5c7db9c4b436d4fa5e579dd2bdf5357290f0b9b8f46fb7fd4c57f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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=doctor+who+the+doctor+dances PDF link annotation
    • http://xn--9w3b11kh5l.com/ckupload/files/11311532852.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/9up4h8m804dc95mplperd73p3m/29992277583.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/27122234979.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/12747173373.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613549f0d1e1c---rediwimi.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/52660634920.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a3ee0d2e5---14809836477.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbdbbadd1b---14563887683.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/7eb146a9dada1051c82723d25975a8e4/43796102899.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/xubof.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/63464579011.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/77023113332.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/66808669410.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/63340240678.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/36421275394.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/89597041550.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/jq84nve0mt8ohopb5qep6fbg6n/95008560776.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/83796355211.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/8495719277.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9c8727b43---87796769882.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/58260036229.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/jorotifulop.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/87267138454.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/56234965488.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/dupeti.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd5bfcdc48---80491801987.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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 19492 bytes
SHA-256: 4276627c9ab282e0567f31c0f23208dc8aa4e03c8be6a88e50ad9b23735e7c6d
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 10416 bytes
SHA-256: e821b156b34b64c9e5489caf7af9d2af46860e02f048dd4bd01c1032421dbd71

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