Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbc6b574e1011ca…

MALICIOUS

PDF

94.3 KB Created: 2021-08-30 21:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f3290d6e4fe8897612c6804bbccd7a68 SHA-1: 6f1bf20696018223d98b4aa86a54a37d35ca5c12 SHA-256: 5fbc6b574e1011ca8987bc27742d01b99b7afdcb4c89e4bbf0c9734320648379
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, designed to redirect users to various other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

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
  • 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
  • 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://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/5vg0d3tqqbpb4pngm47cs4pn37/lokomokuriruz.pdf In PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b1badd99d9239ab471f56c0368d3176d/26171053558.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/losesedidibix.pdfIn PDF document text
    • https://campermagazine.tv/public/file/vutuzinalamu.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/bejezifalodifadu.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/6229268194.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/85346893451.pdfIn PDF document text
    • http://sy-smile.com/upload/files/mibexizijaxenikilir.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/aa1773bf2d0f3fbf6b5ccaaed814d082/48737421259.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2495c2bef---72965671913.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/43240915717.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/tubevuvup.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/60963695190.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d21510d7bb9bab782c18721b81a0cfcb/44490645817.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/762a62b0586721926a4ccb5412a4eb68/gakemebotawudow.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/go2mdpm868diolilegogkq760s/vulazetonek.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/t7546jki7pbs81hpr69k70dm04/jagamofanopu.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/divozelixafatekalaragamo.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/51937613123.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/9110711052.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/jb009ock9125n32i3oti6lcl63/laretapefamosid.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/m50ibhdg0c75htvj0uklbg2kj1/bireberetipojelelusum.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/lafanitilapotepexezelavod.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/butidam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=national+electric+code+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 10508 bytes
SHA-256: 8699373a6b941627dc0c2589ddb44b15853ab03355c9b9343f9b85b4e83ad20d
font_01_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 17700 bytes
SHA-256: 6ea839b6855794d3fb7b4f2dc059b096d191440647affa573e8dc9ae87dd734c
font_02_sfnt_off00013754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13754 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F66 17856 bytes
SHA-256: f6a587464f55ae771fc517ac67901af98d3a5be837d6458528d3da95a525307a