Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0da05e3827352c…

MALICIOUS

PDF

142.8 KB Created: 2021-06-25 12:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0c6c05fb538f7f5b4c075b87e642445 SHA-1: dd030befdfedf424690b51656f3cc22788ba189b SHA-256: 8e0da05e3827352c05b606cc7ace76dc751d886e739f19f01ea184c1f9c723dc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607670c4be3cb---6632738324.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/0s0r5faqbdm5d4b3c443lo1elk/92582113476.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/28c193b5a9ec02ff180d835e7cf6c230/rojozuwapomubete.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba48f2ec217629589256c098928e44e0/zomekeduzexemajav.pdf
    • https://aquarell.ro/userfiles/file/78742069989.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/504c52022803518fba5a4efeeddecc42/kasaxemepopimexex.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cimioqq9ok8v22189vor4jt9i7/31650818114.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/10078b1c34e45f77b47bc98163b8d2c0/44023094963.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ca31d67b8---kuzujobomit.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607216be25e66---tanasojo.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/67f5264b6aa7a1d932851a6800514188/31869847997.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094ced90458a---4304110963.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/98744368718.pdf
    • http://polymer-optix.de/userfiles/file/pamugobofebokewiwe.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f73814f6baa55081658b1cde7ac704f4/xejipabutugumanukov.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=electrochemical+cell+in+potentiometry
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cbe4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBE4 16792 bytes
font_01_sfnt_off0001e3f6.bin
155ee63b3a6ef7b722314ed59bd95f1f3df210742f05545a1fda1b781854f142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3F6 18716 bytes
font_02_sfnt_off000215fe.bin
bce7802d4eab4729be01e137cbd62aa57b38439c45322dc6bc138edf0794d0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x215FE 10568 bytes

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