Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6e635dc2556637…

MALICIOUS

PDF

82.7 KB Created: 2021-07-04 22:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e0bf843158e8adebde7f0768a4c9fae2 SHA-1: c18c650cd09127fcad9cd3a96d2a66670c084628 SHA-256: 7d6e635dc25566370f62eeec68597e2e25709c830904e357e0e9ff488ed0dc15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a link farm designed to host or redirect to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is intended to trick users into downloading a password-protected archive, a common tactic to bypass security scanning. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/44460bd736a1ec9700e724ee2b7a6b10/wutexozeduz.pdf In PDF document text
    • https://avenue102.com/uploads/file/fipiw.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2ba1f7dcd164056fb6af3f9235bc9784/62630604061.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/53295824174.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/55033069858.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/26443215224.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff4aeccae---37312488453.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a3b76f00024f5d910764ffa0c90f1080/nelulevezovepo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1252ae5b096dcd189de9dc9641c022a8/98895078177.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/a8utdpfnl8l12h3iid4h7n33mg/50386583379.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5938445dba---buvugujusilezagugasuxe.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/josuwubusekosazokora.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/t456afspq2v1soe52dq26gn88m/7656259618.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/51656246460.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/379c888f7ce980964ad6de352aa66efd/somelotibuxer.pdfIn PDF document text
    • http://antae.be/app/webroot/uploads/file/wosebidozinubazavoxe.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906d595a0f8---13570010302.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/lapexinukasumaxim.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/52697664500.pdfIn PDF document text
    • https://medtek.vn/storage/file/22651850138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=desertification+meaning+in+tamilPDF 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_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 17332 bytes
SHA-256: 18a0e5646f3f7a62a3cd7bc847b7deb4d2cfceeb2f8d7a8d082f7616b813e61f
font_01_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 10680 bytes
SHA-256: c08a7f801443fa8fe5ef178a41c4815cbf9ae8e26fa90e05d6f2ecf3895c3b46

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