Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3d8b3cb3811395…

MALICIOUS

PDF

69.5 KB Created: 2021-09-06 20:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 409e147a7cef5aad0081e8872aa5b17b SHA-1: e6a9f69e145138a2330177fcfc17b32987087562 SHA-256: ac3d8b3cb381139564117db429477db3ebef6632a0cd0d83828accf4a2337380
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ClamAV detection indicates this is a known phishing or trojan variant. The primary function appears to be directing users to malicious or compromised sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4333

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://doktor-okonski.pl/uploadimg/file/folike.pdf In PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/lpgku5oemdsfustsvuc34p44u5/pujosiwetum.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/50753108718.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/82737743840.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/dacc2dfb6f6b885d96e00b22de73388b/59107423679.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/dovirokok.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/2444db8fbc51865d1b3bc9097c8185a6/20540283699.pdfIn PDF document text
    • http://cortabellanews.com/userimages/milizimobafejuxazetapivi.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/79481165357.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/fdf1b220ed393d69ccad22dc4540b8e1/lolazolozeru.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/086b667e5d47b3787cd2fe1eafaafcb0/fazenolikukowokopaxapumub.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/99894694107.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/58g166986oht1f4v5vfv85lsbr/20384258137.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/muwekodimuzatot.pdfIn PDF document text
    • https://aashianarealty.com/file/kaniziziwofogotozurepi.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/88327650823.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/n15jopiflfbabmgbglm8i9g51f/41057885771.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/lorenojetonedib.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/patenov.pdfIn PDF document text
    • https://preciseenergygroup.com/media/35298707579.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/32069630699.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/56094197074.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/59409192385.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/varilodazusikekorigefewum.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/konifakovanudidi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d3c79628a---39851001076.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/15837958105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=fish+pond+design+and+construction+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD85 15844 bytes
SHA-256: 87c7f1a992bf7cd0578aafd8ae1d47fb51271883294000d1ca70982b9ef5443a
font_01_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1