Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6f96e384ffdb19…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 12:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: adc6fb5befa99adc8650e3b856f2815b SHA-1: 542ce1e74593f59cddf613cc9b4c4ae8c61e525d SHA-256: 8c6f96e384ffdb191ca6fea3c477232b32c7f86f2e5f8417d697ad18a8e51e63
174 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. It contains numerous embedded URLs, suggesting it functions as a link farm to distribute malicious content, and includes instructions to disable security software, a common tactic in social engineering attacks. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://crysiq.ru/uplcv?utm_term=trader+life+simulator+download+apk PDF link annotation
    • http://ceskylakros.cz/userfiles/file/takekefugezofe.pdfIn PDF document text
    • http://wwstationery.com/files/file/29096273707.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613defdd07794---lewosinoziwakiritok.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/53302223106.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/84630105211.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/dubex.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/82349839925.pdfIn PDF document text
    • https://okazionche.com/files/86188941175.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/zogidasixokebagadudulu.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/voxetonotosakumaw.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/lisadiwiturokakenorodun.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/kusukobupid.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/55222040289.pdfIn PDF document text
    • http://colonia-hausmeister.de/uploads/files/nazamonazadusekuwuwotit.pdfIn PDF document text
    • http://a-pluset.com/userfiles/kejanopusefakaveba.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8443c36396a8efc3c79d77c35c1ebb38/70838947677.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/gugagugolunozemoso.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/wulewojabosupukutit.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/newowanusafugo.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/63597025850.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/39079447342.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/52551373703.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wixifodorokuke.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/vatinukitemavorapurokeneb.pdfIn PDF document text
    • http://medrea.ru/upload/files/12675582372.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/89408356116.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/venototewugowefagozonitud.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_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 10900 bytes
SHA-256: a403a80fa53773d5fac6d87042770884462fd03b44a01e63799f6fd92301bdca
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 17216 bytes
SHA-256: c2d5fe3b2977f668473649f7ae71c6c6046a36153dcd04adba7af72f91ab397f
font_02_sfnt_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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