Malicious PDF — malware analysis report

Static analysis result for SHA-256 005b5015fa4fed64…

MALICIOUS

PDF

74.6 KB Created: 2021-06-27 22:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a1ca7fbe5cc4888b5a2c1f584fcd7a2 SHA-1: 6649965922f3c41ef0f7f9fdc4e3e0cef984edf7 SHA-256: 005b5015fa4fed6412248e29eac6a6cfc65c64e2fd803d652e20930d64e1cbc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or host other malicious PDFs, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/194eebb1f36b3956b38d5b0eff8127ac/zexemugaliweduzogevir.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c1d5c618919d8c4859f88b59a38cf495/bubazomimejamolomosexaj.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/g5q0a7psuokidl92j7c2qbon0r/51026860688.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a677c8c6dbfe22392f39ea3da57cda6e/dupulu.pdf
    • http://telmeed.com/web/ckfinder/userfiles/files/37351807340.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g65vaoatrjq6alam54bjf1h51q/didiberudetagupa.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81243bd22a---10155929061.pdf
    • http://biswasi.com/userfiles/files/jawizobitijosu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088169bd8042---kiwaze.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d06475ab251---77335167085.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8fec18bd4487de797209cc024c668333/jibumamur.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8e6942afe---77845030307.pdf
    • http://ttmplus.com/userfiles/files/42397094318.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcad2f692c1---begufumivodiluroki.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160984281c3f38---70586066407.pdf
    • http://huntland.hu/upload/file/96289567560.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/2iji81oehomhcfg8e9rda1rh6b/52190335551.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+sell+personal+cars+in+gta+5+online
    • 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_off0000bfda.bin
d0bfa0a1848bdbe606841f1d0475bbb60d5d781fed61a3f3be009ca337d10fe7
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDA 17028 bytes
font_01_sfnt_off0000ec41.bin
c436e61ea5eb9db0f65664437f2f247a511596be356ba995ac52e37bca3f2a46
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 10760 bytes
font_02_sfnt_off0001053a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1053A 16792 bytes