Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb75bfe0bbfbf9e…

MALICIOUS

PDF

84.5 KB Created: 2021-06-28 06:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ef15f7c58dea71cc351a9d4c81fdc25f SHA-1: 5d8a7db908d53f00a943530e6bc434af5b164dd9 SHA-256: 2eb75bfe0bbfbf9ec0fc3192218c9abcdfea915d572e387351aeb04225f868de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=i+feel+helpless+meaning PDF link annotation
    • http://flambotour.it/themes/userfiles//files/vaxudowajisuzibugelibem.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210621_E5419547A4CDCB88.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/nekibibabunijeded.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6ab18918---86446534469.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/7613823598.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e721cc8ec---48315379509.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/94100546106.pdfIn PDF document text
    • https://mszukam.pl/dat//file/nofofagusujid.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b097b062c27---loxagegokafojiwati.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa334dbb2---garawizigijorobilume.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782d9621d71---naxofakutolexokupej.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/10920873673.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09541e4005---wanepuzogopamibuvavanisi.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-27/20210627235350582842.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/40057184546.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/80218095938.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607464ec25392---59444579772.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/78264057213.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a035032f---nerorapenasuw.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d2f3c2da0---sapezizusimopetujivugomes.pdfIn PDF document text
    • http://proxima-design.cz/files/file/57271159149.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5955890b8---48734396255.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/sm499mrjs6sjr0pcmj98qrk4gu/fugolovupigisaxorejud.pdfIn PDF document text
    • http://web68s.com/upload/files/27437022244.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608b89777f076---7604350905.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_off0000ea2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 16696 bytes
SHA-256: 9178493845d637b09060770cc8a07bafe02d8f7e28c46cd6664b34a8be9bb375
font_02_sfnt_off00012da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA3 10440 bytes
SHA-256: 208bffe4f8babf8f41dbedbd3c5add7197053041a4439b6f9d5da9d31dd99f0b

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