Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a147b8726b7ce06…

MALICIOUS

PDF

87.2 KB Created: 2021-06-12 12:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72fb1a9d70735699cbc21d4a8fa75077 SHA-1: 2cae3364e750c3f7bbc7bec5bef34bd6dd1bb5ac SHA-256: 7a147b8726b7ce06333872c37ae0cbb62d5634ee40d3632e4eac7399b2364b41
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document exhibits social engineering tactics, specifically a 'ClickFix' lure and a 'Password-protected archive' lure, instructing the user to execute commands or handle password-protected files. It contains numerous links to potentially compromised websites and upload storage, suggesting it's part of a larger phishing or malware distribution infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://crysiq.ru/uplcv?utm_term=hack+wifi+password+pc+download+free PDF link annotation
    • http://myredm.ru/uploads/file/ketezugilugasokamibale.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/amtsrtjaf24ma3ba4u982nthtv/lababirore.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/o8trmpqmrve205776qdmu80p4i/fidifofebogokisogapo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609421aab258e---rixalojakimotok.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/92350895018.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/luwomixifupig.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/wuluvajomuku.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812a8c77f21---liwivodonapuzepowot.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a58e820b---39589565010.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file/%5C/75479562281.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ng6ojlejt1o43nu3ktei620eq5/74582526212.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608300f56add2---977938104.pdfIn PDF document text
    • http://sun-eko.eu/files/file/setimibogika.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/1e0be1d5a9d21d1b3affa993ed094e0c/vovepubu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096de213d927---11338569241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 5268 bytes
SHA-256: ef8a4c5a850333ba1bed231b9dc7bba04e4f8111a2306954b2711f37231f1a14
font_01_sfnt_off00012902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12902 11380 bytes
SHA-256: 091c343bb1c1a85d0151ae8eee9aac4fac80a0708c831b02fb87afd341199ba1

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