Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eabd32fa6bcd7c…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 04:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35154dbf84c5c8751776e21ef6a7d30f SHA-1: 72dbbbd2407af53103dd302c52d7f38779c51051 SHA-256: 17eabd32fa6bcd7cd5fcf7f9b5e16bb1bfc5bdc567d83ccb67916e78bba91a2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. No scripts were extracted, but the presence of multiple external links suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112f2efe852f---53698582733.pdf In PDF document text
    • https://totounited.com/contents/files/76288004433.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/jumamobemezipifow.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/jinevefuxakovo.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160edf8ea17e2f---77173982949.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3d7e8208bebee4d03f959a1d7ad2e986/dapojimiz.pdfIn PDF document text
    • http://reflita.lt/uploads/files/xelabotuxamekiterup.pdfIn PDF document text
    • http://tele-video.ru/upload/files/palexirisawumadap.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/23947182054.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/86703487638.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c56ba1d28---50711271186.pdfIn PDF document text
    • http://namngonviet.com/user-/files/losemap.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/perewukawojewipobexe.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/161542324.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/j3vk0itn092vg25e00qcu6546d/29463997732.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6b6fee99bd27f665651febf65927dabf/14256679586.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/tafita.pdfIn PDF document text
    • http://kisito.com/userfiles/file/faramutil.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c17816d1---48655933753.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd87e9aa9---45298829195.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/37784622780.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/57034986462.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb99337b47---tefomemakefijotika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=stormie+omartian+prayers+pdfPDF 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_off0000d450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 17808 bytes
SHA-256: be93d0bc7bf8e79358b5ec7c564903939e2af1867446b4df9d9368be2b47da15
font_02_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 10804 bytes
SHA-256: 3f4257951443d9189536ba9da1d9eb7546107d7e3e970d92335eb639cfb2fd58

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