Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e95ee434dc69b6…

MALICIOUS

PDF

87.5 KB Created: 2021-06-27 10:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 267f88f521d301ce1cb623bcf65f1203 SHA-1: 8aec625821edc3d2112ef10ffa4213c7b42d9428 SHA-256: d2e95ee434dc69b6c78c088b6b1e99b948654f927a5f2a8fcf78f5478339349b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/7a5d35a49d57e41fb19d579d4c615a5c/matipuwitepebazuzosomuk.pdf
    • http://extracam.es/app/webroot/arxius/file/74935374333.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e544b1c1ab4be9d41b169e41fc442f2/59684307271.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160adb6ff191c2---xubotimuzaxokegukonaje.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a001c7ae4e5---palebelamujikef.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b4ad3b536---17698704210.pdf
    • http://hitecds.com/userfiles/file/neketudikinoxula.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607427c7bb9e7---96180552707.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/72650020251.pdf
    • https://asset-books.com/userfiles/file/77614301971.pdf
    • http://coreaad.com/DreamDataUpload/file/3282410676.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rvakpmbastanaa2th9gb0i4qg3/demedebebefunemud.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2621adf9cd---93678592615.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd3b4635e---senipu.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092905cf2a55---nejunuraponutirapiwogod.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/lunuvosewomexeg.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b82faf14de379ccdab5072ad81d6f2b0/laseweripaxuxelagegiw.pdf
    • http://altinay-law.com/images/file/rarejopurit.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c5d00b15fd93e5f467261856f15d2b8e/50796114994.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/ec6816637eedc070eb2cddc7634fe173/siwexovipimujezabema.pdf
    • http://biolabsrl.org/userfiles/files/67951586265.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/10150b0ccde2958e2350fa02edca0237/dijotetose.pdf
    • http://chatfieldfarms101.com/userimages/78470648688.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021521445454276.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bed152313a5---bifepevunimikutufolekowa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+opening+in+chess+white
    • 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_off0000f550.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 16792 bytes
font_01_sfnt_off00010d62.bin
c84f290444c6a200d3e8fba44500657a1419a1e81eefa0426848f59207c3e203
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 16884 bytes
font_02_sfnt_off000138aa.bin
90e62e5fb4013139ac6691c4143563f61a708379d654b4026d26bfc14f697859
pdf-font-stream PDF embedded font (sfnt) at offset 0x138AA 10484 bytes