Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f08655816ad768d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-09 11:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c740677f7e93474660b6256ca8c28a81 SHA-1: 0a0e41c322354ebbc0aa6e64bf286b54c2e0e8cb SHA-256: 6f08655816ad768d079a84a401dd8d7f444dc7acf8fdaaa8b747767b65cac5d3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 5

  • 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
  • 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://bulk-supplies.com/userfiles/file/59456984193.pdf In PDF document text
    • http://lawina-radom.pl/files/file/62789155744.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/xokejige.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/juwaremi.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35756246170.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/79876567763.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/65131888781.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/11021966205.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe8ca6c119---vubutal.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/mobeganexapokoxitujenos.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/39463680642.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161364f92830b7---21175154748.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/90832877286.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/mizomipopawerepikigomo.pdfIn PDF document text
    • http://linker-apps.com/files/famekenepepi.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/13127630082.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/64800669652.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/jikekato.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/20825322973.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/50701500607.pdfIn PDF document text
    • http://skupka23.ru/upload/m/sevusoviviwudigamif.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e32e36f887e5b391850e46ca0deee47f/negopejuxip.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/98117388815.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/96588718356.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161336c8ab75be---29263979082.pdfIn PDF document text
    • http://uhorder.com/upload/files/15280802390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=watch+tom+and+jerry+full+episodesPDF 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_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 17732 bytes
SHA-256: 209541db2fb534c654bdaed1a7a1c69e660818680c54baa0cdc615c57af834c4
font_01_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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