Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d2e9573ece117b…

MALICIOUS

PDF

96.4 KB Created: 2021-07-29 23:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2f865b2febd374316fa7b6d7300e72e SHA-1: c8e114aeba6077d0c6628e207792e3811c7e0b07 SHA-256: 20d2e9573ece117b4bd38fb9f4e07ac9267c07d57fbc3c902113788ce399ab22
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste commands into a shell, a common technique for executing downloaded payloads. The numerous embedded URLs, many pointing to potentially compromised or disposable hosting, further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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
  • 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://poolprotektor.com/userfiles/file/vugabirekovadutobesezimam.pdf In PDF document text
    • http://haumeaonline.com/userfiles/file/56032766409.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/92831558873.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/lomikitofipi.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/boviwitapuliramutag.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/gexir.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/bisepasajuwu.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/ddc56c3fac781937d2af6491ca4d246c/85909643283.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/gagog.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7e8f86a1f---50056814352.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/19b1129c88336d5fe88194c03d1e3fee/20679625689.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/53914970446.pdfIn PDF document text
    • https://moolans.com/uploads/files/pizotivanodi.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904db8e62ae---pogasuzuzobijovaf.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/romudazagoku.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/e534mvhvisk3n2ghr7odr29tbd/pufepuba.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c644b7ac---wuzuvefupeweseguj.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/8v4ke18t653278u8th4ltidj9s/retetowepimozerivalo.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/28520488912.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/nalafelunojo.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/rafimubazulez.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/20216171081.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/14860015610.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cb00128d3b9---75317773237.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/kexoxoxulanajujiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+size+speakers+are+in+a+2011+gmc+sierraPDF 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_off00010f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001274f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 18496 bytes
SHA-256: 30a8154f75018f7700b6fb2055d362da71b83d1a966b865273ceea28a6b2fd1e
font_02_sfnt_off00015887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15887 11096 bytes
SHA-256: 051e246de6c61f481c0933e476aff4c14f7fe507281fd3e9bb34a6f6fc4fb0b6