Malicious PDF — malware analysis report

Static analysis result for SHA-256 be29cd28ac153cef…

MALICIOUS

PDF

101.8 KB Created: 2021-10-28 03:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 32d8fa264af4493a68c2ee5e94c532b8 SHA-1: ea6dd87d506efc5dc1beb36061f76d8991d0ead4 SHA-256: be29cd28ac153cef3d865e791114ac6bf8e8b7a9f088bddd1bd641f5671abce7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads or appear to be disposable. The heuristic 'SE_URGENCY_LURE' suggests the document may contain urgent language to prompt user action. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://unewstoday.com/task/userimages/file/36636624416.pdf In PDF document text
    • https://aquatrustfina.com/userfiles/file/belofazamimulotesomexe.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nilorizorevuzatasa.pdfIn PDF document text
    • http://wdnederland.nl/file/vuzajumebijit.pdfIn PDF document text
    • http://grossbuch.com/upload/file/47956000652.pdfIn PDF document text
    • http://vitcongiong.com/uploads/files/25535862637.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615588b15238e---80160115237.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/dapowoduxojuj.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/51629443375.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/44224765588.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/84326616587.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/k7fnf4mfihl0n8irnp74n95gl1/rewixunejokali.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/nekubetaxe.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20211019_7_46_2.pdfIn PDF document text
    • http://apvn.info/userfiles/file/38482704616.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/80439172986.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/67897067513.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/26913760955.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/xuzerijivomij.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153bfac97f9f---dewidoguk.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/fupewubud.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/rurel.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614853fcbb9f3---56415226292.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/nuzumenilunov.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355166537ea---tolip.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/delul.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/tifelime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/tgwjJlsMqHc/uplcv?utm_term=what+does+a+strategy+manager+doPDF 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_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 10664 bytes
SHA-256: 03d75e27cd4ce8b213c6d80e5848023377e0f1dc0f6e2318a38fb2933c9ee84e
font_01_sfnt_off00014157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14157 18752 bytes
SHA-256: e732805ee1d3e76056d428334963bed1391e72c87384687c12c582cd4c760cca
font_02_sfnt_off00017196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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