Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca7e61f123dbfc9…

MALICIOUS

PDF

83.2 KB Created: 2021-08-18 14:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6baaa7d89c340c46e0e9c5332b55d15f SHA-1: a410b75ba4e3f00373fc2a7f5e14416580af5430 SHA-256: 0ca7e61f123dbfc94c8d5e69f6d7580be94c4a083dfb8973e5559795c62e5cb5
204 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 and trojan threat. It contains a high number of embedded links, many pointing to potentially compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'password-protected archive' lure further supports a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caae635776b---minowasenelijogisoj.pdf In PDF document text
    • http://baihsad.com/userfiles/files/20210712_211648.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/fusevexeputuvosemi.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/gqt6v3dn41ku135eb5p5n3t8eo/48524968340.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/fidajozod.pdfIn PDF document text
    • http://timebymtm.com/upload/files/59479437614.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/tuzabume.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607630f12b23a---fexawari.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/29254434198.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a950b716b3727aca414d3b99ccc1251a/48873726347.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/2g8t5e86lbnst1lm7jh86fhol5/vezilegajilujixumiva.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fb7b85b59579d50c793a4ebaae477dae/26813623009.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/87790394244.pdfIn PDF document text
    • http://inistor.com/ufiles/files/47849074273.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c3578fcb---wumiberagilufaxufurosixo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b23309653791a98156756687838a85cf/vopazabekaketefiwobet.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/gabotepalirefi.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/xezuja.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/31459635202.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/f0b8b70d0fcae06f9e5829608b169fb2/bagumuwuvub.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/4640477084.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=nero+burning+rom+2018+crack+free+downloadPDF 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_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 11448 bytes
SHA-256: f44d3aeb106cfbc32ccd019ed6f8552127ab7746a907325e038b5416d1dcfea5
font_02_sfnt_off00010ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF9 17548 bytes
SHA-256: 319e2b7f2bc8630ae8786da10a237f2373f91daa02672536cb77bae0a238ebc6

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