Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd350bd5a47d46e…

MALICIOUS

PDF

86.3 KB Created: 2021-09-22 12:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 38b40616a30709e04567df56a9ad5698 SHA-1: 7e6ba116d1ea6fe1cd14f25bea60b09910e4a752 SHA-256: cfd350bd5a47d46ee73e3c8bf2d2083b78dc5ac78964133be4d610561b790a45
204 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which appear to be hosted on compromised websites or disposable domains, suggesting a link farm or redirection mechanism. The presence of heuristics indicating a 'Password-protected archive handoff' and a 'Visual download / call-to-action button lure' strongly suggests the document is designed to trick users into downloading a malicious payload disguised as an archive. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://houtackers.nl/userfiles/file/61806101946.pdf In PDF document text
    • http://studiogalata.it/userfiles/files/lofugakedirubot.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/nibujovaxujoxejitigineje.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210914104809.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/36145118006.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/11864572066.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/78890433122.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614acc9b31a1f---vonumumaw.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/26809532996.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/7832627677.pdfIn PDF document text
    • http://ternovykh.ru/content/file/58093831524.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/74612401288.pdfIn PDF document text
    • http://df-2.de/images/daten/file/radijukapi.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/torive.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/bitikaf.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/61e5d2bfc2c7d5b472269aca84d606de/59812827844.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e7308dc1d---69038779847.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/wizipijarupil.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/2771269993.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149072520895---76270209106.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/8012586325.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/tevolularuzazaramopasem.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/nitixoteramatelodis.pdfIn PDF document text
    • https://datajournonepal.org/files/4925122439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+colour+do+you+get+when+you+mix+blue+and+purplePDF 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_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 17976 bytes
SHA-256: 9420fbaf9528607dbbac9b0ffceac4df0cd065223c2fcf4d41c3e5c07ad8320d
font_01_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E9 11328 bytes
SHA-256: a06be8e9cb90aea5458a4491d92b63ddc21358fd61c13798dcf34cb4eb9ba5e7

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