Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0ae42522f68ac7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 02:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 31579c0795abbf077fe97a0df818bf55 SHA-1: 65872da5d0f66cc40bcdd9c2f2311b430aa184c2 SHA-256: 3b0ae42522f68ac7debcc0d402ba88b05b516167420343364aec07d9d2dd7885
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed for SEO poisoning or phishing. The presence of 'cmd.com/data/files/topetopumumepig.pdf' in the document text suggests an attempt to disguise a command execution or a malicious file path.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://medvor.ru/uplcv?utm_term=area+of+triangle+and+trapezoid+worksheet PDF link annotation
    • http://esoftland.com/userfiles/file/16920510627.pdfIn PDF document text
    • http://emannsltd.com/userfiles/furujakoxamarupoka.pdfIn PDF document text
    • http://tele-video.ru/upload/files/remafijumetuzeril.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/sulenakulozevaviweniguvu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd47668d96d---85147743616.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/skoha4d7jvg2tm67g3o657npqb/gusanonesupadugorubesas.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a79b43bd45f---13429483586.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c1ffa25891---154628291.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/33528889668.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/xiturenixedabagutejulite.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4538b8d7d5135f3e3e8c0f26f26a5da9/82633323742.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac917e0c52d---zezitatumajetakojanaz.pdfIn PDF document text
    • https://preciseenergygroup.com/media/4430038543.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ffddb3f1---xekelosipiripupumezazi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ae65dff9---fomewi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085951e62044---vilojemubujudeb.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/zepisipiketafo.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/43957052437.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa6c795503---52255764814.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af6b5423da8---tivopovevazokaz.pdfIn PDF document text
    • http://qdcmd.com/data/files/topetopumumepig.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa281a6fdb---56678521652.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080d7976baa3---39349653045.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/be3ousrrhngsv92bja7rie100s/56286171690.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/vozipeluwivol.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/vebejusopijuloxatedelaz.pdfIn PDF document text
    • http://southportrubbiIn macro / runtime command snippet
    • 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_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 17452 bytes
SHA-256: 6c6c2bf7cbb21ccca11b5ba114ca2bdffb59fd68317918cb3a8269e3a72e7036
font_01_sfnt_off000108f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 10996 bytes
SHA-256: 94437f34335bdb8a41d40aa710a6de6a024021186db68730b111369ae5777e47
font_02_sfnt_off00012256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12256 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.