Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b200ded409a6bc…

MALICIOUS

PDF

71.7 KB Created: 2021-09-29 10:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00bac2791543a81596fc666681bcf2ef SHA-1: f849a5e82c7703f4af0b037d27afe9b5382b4fb4 SHA-256: e9b200ded409a6bc6ec09d243e7fc5ba431679bd778ba4c87f2a6ffdc2862af2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common tactic for delivering malicious content or redirecting users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://castilloexterior.es/ckfinder/userfiles/files/29528815022.pdf In PDF document text
    • http://ourpreferred.com/userfiles/files/redufojimi.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/38880697513.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/xesijegade.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/23625318154.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/mowaxiferubiwuf.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/51260493753.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/ladogiku.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/5694081486.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/89872315047.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/26549709997.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161538adabaa1b---mifepomoma.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/77479867642.pdfIn PDF document text
    • http://autokaryszczecin.pl/userfiles/file/30037796457.pdfIn PDF document text
    • https://rinducm1.com/contents/files/zivepoxuxapar.pdfIn PDF document text
    • https://isleo.com/i_photos/file/63984833868.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/26824639594.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/99329091890.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/80695038766.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/nuxoxizilopemofufozaxo.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/34311157548.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/20229790722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=king+root+7.0PDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/gapixeteviro.pdfIn PDF document text
    • 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_off0000b259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 10004 bytes
SHA-256: c2fb14b1b0a4f2a299b6391bfe3598a67841bce057483e3ff2016810200d7ab2
font_02_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 19268 bytes
SHA-256: 5c32be62ae92541efb8ac85ed698d63610d455b0a6c9f32ba87e5449834ceff4

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