Malicious PDF — malware analysis report

Static analysis result for SHA-256 6836be428d17fe06…

MALICIOUS

PDF

79.1 KB Created: 2021-06-13 21:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9aa95697e508d85b30bb6ab41ae58e9 SHA-1: d5b7978da447e49b365d3dc4ee04212eab29ffa4 SHA-256: 6836be428d17fe067a8451ac6cac4ca9ba49dbadb4625934f7c03d5e2193ac0f
236 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The document employs social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to copy and paste commands into a terminal. This action is designed to bypass macro restrictions and directly execute malicious code, likely leading to the download and execution of a second-stage payload from one of the numerous embedded URLs.

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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://wastran.ru/uplcv?utm_term=how+to+copy+paste+a+pdf+file+into+word PDF link annotation
    • http://leaguengn.com/userfiles/file/%5C/97001437751.pdfIn PDF document text
    • http://promador.pl/userfiles/file/jutatokusuzodaruvogusafof.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6157021b3---temijusemoxalalevanodufud.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16f80a4097a733b4926fb88e1f4b12df/63434717128.pdfIn PDF document text
    • https://olterus.com/contents//files/xotezubaradidap.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/d03c996bdfc4ef50c5caf80efc2c90d0/begenurefakiporotogaj.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb0386839---24448402576.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/067946b923da513bca8f3738106807d1/33672496760.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/244a0e050513baf3da8b5695e187f96c/75831245915.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079420aab6c5---72057212031.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/1356247d61ae8c584586c22fa0273ad0/daxizizesoxefopo.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wugezululob.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ef570d8a---89205800838.pdfIn PDF document text
    • https://dm288.com/slicice/file/36450025622.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/32053804493.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071c9642e212---72694599183.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d107bd8a3b---bipuxasesevetuvumasulotes.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_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 5304 bytes
SHA-256: 1eb2a16b8f63422bddcc557cde97c1e10981c22249c2ba421263e7f4359612c8
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 11180 bytes
SHA-256: e4c4bd9fcd35eefd90796656790235b5ac13c60ff3f475a78ad2f1b349678f55

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