Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dac0326c6f10d35…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 12:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb3d0935380166ec0032168a7ce7ec24 SHA-1: 311c2b6b0ddf72e0c6a5f8671b0415c91be67904 SHA-256: 4dac0326c6f10d35fc2d5012ec0812221449cc146a396c5387efc113aa31e49e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress installations, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL targets point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/630pp46cnsb7f2b9l554lhhdq7/98687595071.pdf In PDF document text
    • https://thietkeweblongan.com/upload/files/23639561744.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/53991741958.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/gojejuvivizilujozatupofer.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/77961681939.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/86232650186.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160971a2442e72---10488637971.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/528a7c90d884f1c582a3b9ee886f4ecf/34883453799.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor///file/98793209579.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/napamegadadoropaveredo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f08e03b9504e423e808b6f695e7af34c/tofavobapenireresa.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/52964775798.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/sojudegaloweleketipa.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9aa06866875411f0563b3b52372ce83c/94312325389.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/8129427021.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210258392577.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1e24fced1f13f95799f264996a18bf5a/15103190851.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/94659569988.pdfIn PDF document text
    • https://panama4d.com/contents//files/20421562290.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/46459591645.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161026dccd7d77---90162571868.pdfIn PDF document text
    • http://kebirbeton.com/userfiles/file/zagewowiwuvorum.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/gewunovefujepasasadorefoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=javascript+bangla+pdf+2019PDF 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_off0000c0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F2 11200 bytes
SHA-256: eb31635899f0d578fedf49b6618155adf16904134e16a34869686d816be26b04
font_01_sfnt_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 18768 bytes
SHA-256: dfa6c563d3bf3fe7e774fbeb7038012d096642683bef3fef19d20136596b408d
font_02_sfnt_off00010a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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