Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daf29bb7f63b5d6…

MALICIOUS

PDF

71.0 KB Created: 2021-09-28 19:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7472734ca9515d030e3ecee06bf8cc02 SHA-1: 7f954310b9dcb6200d85a57e298c61ad9120690d SHA-256: 0daf29bb7f63b5d6b017a7d8d543823b5045648351fccd27a33d49ae9aba3eaf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://bsbcarpet.com/userfiles/file/mefawikojafu.pdf
    • http://joy05.com/_UploadFile/Images/file/mobafudevosowuvozozono.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/64835008408.pdf
    • http://starcity-vinhomes.vn/app/webroot/img/files/3777195301.pdf
    • https://garmin10.ddbseven.cl/userfiles/file/nipalitopejavaxeza.pdf
    • http://hicoweld.com/shop/fck_file/file/xuduwuk.pdf
    • http://atoutslegion.com/userfiles/file/84924894422.pdf
    • https://derechosenred.org/aym_image/files/62416457775.pdf
    • http://caopump.com/admin/userfiles/file/61092831850.pdf
    • https://hoangnhataudio.vn/media/files/rulovabadebadavam.pdf
    • https://adminico.nl/userfiles/file/foriroduwapivubagije.pdf
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/gomovak.pdf
    • http://assotechne.eu/userfiles/files/xugapefug.pdf
    • http://kvbm.org/pds/userfiles/files/10731555491.pdf
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/xisutimowefekikafi.pdf
    • https://unicon-msk.ru/data/files/doxazosuf.pdf
    • http://crmloccitanecr.com/campannas/file/fapikewora.pdf
    • http://sourceandsecure.com/uploads/userfiles/file/jujitojukamewize.pdf
    • http://alphasigmaoverseas.com/userfiles/file/wokam.pdf
    • http://koyomisushi.com/uploads/files/30495601031.pdf
    • https://remini.hu/userfiles/file/90905153029.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/dolelejoroloxipupavof.pdf
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/56929909329.pdf
    • http://jobcred.com/rk/jobcred/uploads/image/file/49219208432.pdf
    • https://wic-net.com/userfiles/file/86138991249.pdf
    • http://x-site.by/upload/editor/files/22570788161.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=hobsbawm+age+of+empire+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1d5.bin
ba89eb5eb22536fa63437400d1d75eac9e7d7845807a12e9ab1c8dd137a2f896		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D5 16948 bytes
font_01_sfnt_off0000ddcd.bin
7cb3e8ceda69c1310d83ce41cbcdf6ba2fe3a7ab8dbaed600385344814a9c63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 10812 bytes
font_02_sfnt_off0000f661.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 16792 bytes

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