Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f3adff95fe24e3…

MALICIOUS

PDF

73.7 KB Created: 2021-09-01 10:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e9069e0c13cae2e2c00d64e6e9c311d SHA-1: e5887ed750f382e6e8bef65e4400821a3be6f0db SHA-256: 60f3adff95fe24e32645e216c00b7763bbc75b1510fc9501d86c6df30faf327a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites. The presence of these links suggests an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=state+management+in+asp+net+pdf PDF link annotation
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607586638dfe0---dijefogatokalup.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/bovenunolikakuligute.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716e245132d---71089220473.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/f6b91648ac88fc277f74efc410f0feb8/88576325572.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c257b3ec698---tevelerisujewepifixiso.pdfIn PDF document text
    • http://shosholoza.de/file/tebofekafapiwazibife.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/bd1fc39fe7b2269ad40df879b2b1697b/tabetojifaxefeka.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/64ad4d4eeefe32684ce63927150bc67b/47464500603.pdfIn PDF document text
    • https://emmaushuis.org/pages/56655512413.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/zopisaselibugokas.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096e1fc820f3---30131310184.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/boropiraropalaselovofa.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/3745079603.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb353d50fb9---73962296066.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e20d80a8ba7045fc992d34eacb66aeed/4435659325.pdfIn PDF document text
    • http://snft.ro/media/file/sijatujasejomiwejazoze.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32567b829---14209875972.pdfIn PDF document text
    • http://e-district.org/userfiles/file/kezesigeritenoze.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/76742399097.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_off0000bb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 10652 bytes
SHA-256: b4caca4f0b3287ffa3265a1b94f9cbf65dd81d0e290b465287a13e2463d940b0
font_01_sfnt_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 18348 bytes
SHA-256: 76033082195913a2ab30b681766f2776e9e79e7fd4b3eab846bdf87f07860857
font_02_sfnt_off000101a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1