Malicious PDF — malware analysis report

Static analysis result for SHA-256 206c892ac8e4d4c0…

MALICIOUS

PDF

90.8 KB Created: 2021-07-16 14:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 90b07c3ee8de725205b64f30cc4b0741 SHA-1: 4f1d483cb3db724e5aa38258bbcc913206c5ae5f SHA-256: 206c892ac8e4d4c0cf0fa782b679b814fed06e9779d01b20325bf47937617a75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan variant. It contains a link farm pointing to numerous compromised WordPress sites, which in turn host malicious PDF files. The presence of embedded URLs and the nature of the link farm suggest an attempt to lure users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://chcial.ru/uplcv?utm_term=how+is+average+of+a+batsman+calculated+in+cricket PDF link annotation
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160806e2f3d3f5---vuwomoduk.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/vupoj.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/59758739435.pdfIn PDF document text
    • http://axwelindia.com/uploads/lulafolibub.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/22089122185.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/bae112b42d027bd68a6a8e0e26930eb9/39828513735.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/18811359073.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b745b11de0f---74552202842.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/1500864315.pdfIn PDF document text
    • http://fxmeat.com/upload/file/0e57d18deea430211074af25db436b45.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6e2699adcb7dde654a84afefc4b55a88/lidapuzeb.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/418164e23ac20209e2dbd2610773e8ba/vogik.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/57rl5cdr5b6rupk4l9b8fc5kse/regesokokupakor.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/66963632480.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/xelasekenolide.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f512afe78---bilalilirobiduxafoj.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052122082717.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/19e509cfccd16ceda8b60e7a28494351/tibifilumiwukevaz.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3snq51imcd80mbbr4v7pjeeg6r/sedarowenexuzevipogopov.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/44427485007.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160769e3eab881---giwezeforovibuw.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/60854992007.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e57d1d7f017---barififuvunafalorem.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/nimonolonudejegomurunum.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/nugele.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5bd2b6cb---53549335380.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_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 11296 bytes
SHA-256: b29938632c74928f4b126d6f58f01dad859c485ea9b30a1ba3b738ecf394e0bd
font_01_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 17744 bytes
SHA-256: be1fab9b93516065a086f1f4d411f65a889b1ffa5d41174a702f1c9e3fe76bd8
font_02_sfnt_off00014530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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