Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f061806b6df52dc…

MALICIOUS

PDF

96.7 KB Created: 2021-07-27 17:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 966e0f1792b72f9eab1307b47c3958d0 SHA-1: a85931e42d622e8ec5c125dae117dee15f8505a2 SHA-256: 4f061806b6df52dc07631592a105e40497333394f6d20bf2a649b6087eaec518
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://discovercefalu.it/_data/images/file/71397618747.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160c42272e7e83---nenekegomogezotexotekures.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/jaipbl7krin54dudiip9kd0r00/zinimojopozejatimiduke.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c22c5442528b5ad92f3c9b2f287d9677/26684419874.pdf
    • http://nesthomes.in/userfiles/file/61792794658.pdf
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/kidakasubawumirutoko.pdf
    • https://mimpiindah168.com/contents//files/munumiwuzuzejal.pdf
    • http://varanini.pl/userfiles/file/24936199471.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/jipipenuj.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/4e3e3fbd27f4310b9c3e0cb8e3f33152/77205205434.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a49a8d953d0---83403575721.pdf
    • https://ranagro.com/files/46625009606.pdf
    • https://traveletrust.com/basefile/traveletrustcom/files/wisadajudisofovivagabusep.pdf
    • https://chiuman-hk.com/images/file/60416176031.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a196136ab1---nuxedesemokogorobep.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f729b03c4580fc76037426960dea3a99/tawufizejeviko.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/32788e90981360bfdf004c7b010d9477/45747873644.pdf
    • https://vivekanandbawwa.com/userfiles/file/dozofes.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/in14kpe1enmgse28t6pp1pl5dk/fewotabaw.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ef323d86883c3ba1a081ee0cb2492cc8/zefizavaditosumozixa.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5124d49f6---nalojom.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bb3fb1a0bb6c460ea302f223a8672c77/xavek.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/340b882d3840735c523c5bb7f4a60f04/45862070045.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942fc46f0f3---7487068457.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+care+for+a+baby+blue+tongue+skink
    • 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_off000113bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113BF 16792 bytes
font_01_sfnt_off00012bd1.bin
cbe0e0ead5071742f430836dd0d9c19ba442e98c44fcfe8796f6462660887899
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD1 17692 bytes
font_02_sfnt_off000159f0.bin
4cb1907c156d8dd02844f1101f6f17f27d4e252e2406e16dbbcb57eaff60b279
pdf-font-stream PDF embedded font (sfnt) at offset 0x159F0 11036 bytes