Malicious PDF — malware analysis report

Static analysis result for SHA-256 b192fca3d2bb8f0a…

MALICIOUS

PDF

75.7 KB Created: 2021-09-11 23:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1caef54687840f564a47f2b5b7b454f4 SHA-1: eb3db9fb230f6aa5b65cd9d22cab4df65212b2a0 SHA-256: b192fca3d2bb8f0a12616c0e109b074e97642241a621aad2656c5bbc122e0548
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious content or are part of a link farm designed to obscure the true destination. The presence of external URIs and the overall structure suggest a phishing or scamming attempt, likely to trick users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5e2b3b04---41802312019.pdf In PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/xamenezogevufulo.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/80292515783.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/37247489708.pdfIn PDF document text
    • http://decorstore.eu/upload/file/jelinikekokowabaw.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/19326580319.pdfIn PDF document text
    • http://arsvet.ru/img/upload/jekibobajaxamise.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/32763613751.pdfIn PDF document text
    • https://0900107678.com/upload/file/96838733195.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/mowapev.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b2624d3dc---jedisawevivibuxujubip.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/83531699846.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/pusegav.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/gopopupijifozobile.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/46128591233.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/xunefa.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/tanozixegizo.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/61107917124.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/gitufivakawes.pdfIn PDF document text
    • http://asfalon.com/__files/file/34695169985.pdfIn PDF document text
    • http://biomehl.com/images/content/files/75698111004.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/mibimulonenoxulatapovudi.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/75226949395.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/nikalituguz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fortnite+ios+download+apkPDF 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_off0000c1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D4 10540 bytes
SHA-256: 131afb16dc0964afb86a61550382c996deb21776614397c329309516cdda18ef
font_01_sfnt_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 17864 bytes
SHA-256: 230b4c6da6f837e5d2b4a55514d92a0a2be322a1971c2b8b14f19c5c786d5a89
font_02_sfnt_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1