Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace0212b74cc57c1…

MALICIOUS

PDF

86.9 KB Created: 2021-07-15 09:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 517242ee789ee0a5a8d3e09016b6467d SHA-1: 9b4246bf56bf0af74ee8ea2f666cb67c54ff1bb0 SHA-256: ace0212b74cc57c194308696dae325e6a1e0bbc24b0eb16f2f717d626d70e4f3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and a link farm on disposable hosting strongly suggests a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://garglob.ru/uplcv?utm_term=planets+in+orion%27s+belt PDF link annotation
    • https://ludifrance.fr/userfiles/file/buwewibe.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/taxujowib.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/gavimovuka.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/fc98a6c43178891cd5f73c6f1f8633d7/52843178890.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/cfcc5d19047475e0fa07ed8efb3070b2/55879381231.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd69b843cf---9678193632.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/23728866377.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2c4d63763---58410031397.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210618155353.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/pudikosepofovowo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921643e1267---27373335379.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uhcdlm00gi3jgtu7b68gm08atd/5900770516.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa11a87d0d5---dejeweregubipejafuzi.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/xafifuz.pdfIn PDF document text
    • http://groupkaishan.com/d/files/52592904015.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/97f7a707212d82f578b0516992fa2248/wikozexagaxesedap.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c0132860b95b699d3e7d10ad7c9ecb4f/sopumapibupuragigawetik.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a92988cb98e---fasisaxud.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/bakafanutavow.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/navupubetesaxujelisiguzov.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/napizudap.pdfIn PDF document text
    • 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_off0000f062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF062 18232 bytes
SHA-256: 1544fa2dc1e4aa9e6590a41c0f9c318cf8c3d9869608db38d56651cc541b5fee
font_01_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 10276 bytes
SHA-256: b3560266d032b568aa89f9c189d41cd8669a8ceed292d91e96dd04c7b6e5c8aa

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