Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe15ac8ac6f6979…

MALICIOUS

PDF

133.6 KB Created: 2021-06-21 11:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0018df16c5cfa870a1acb3ec4e9c4c43 SHA-1: 00133d1d0d6e17095ebf9f3f0efe0a6d7c31c312 SHA-256: 0fe15ac8ac6f697926e6dcee8da485784fe2c991b48ded473f7a90163205ad78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection for phishing and trojan activity. It functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The presence of multiple distinct hosts and a large number of links suggests a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7b18e8300d6db788b458f50b24b712a9/rixifimemabex.pdf In PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095a7257ea89---15365488347.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec91a44fa---lixunagi.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a1c2d73aa876ab446fe0c7028f40d60/kizorodipos.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/laberonadutedula.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/88e470c3795030dace5e7e260d2e24c5/nibiduwanowelifezijevus.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/9eacf3e710af2bbd7c826fce12fb577d/jomovagapu.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/voxezudilali.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bf5279097---72111339556.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/384d9d9b09d9ed0a229b7eb652f526eb/zinufat.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/jimapenuruliwojozorazota.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d111c0a49---viriwa.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/milanolexumuwoduxe.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/rufudivosewafezovopedexaz.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/58784047531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=tap+tap+heroes+mod+apk+1.0+0031PDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text
    • 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_off0000bc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC37 84936 bytes
SHA-256: 2da2a205a40e840f30c2d7d42d8d6d47772d6dd2692168b44c337a772f3cd3c7
font_01_sfnt_off0001bc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC1A 5572 bytes
SHA-256: fbe4ca9a29b44f6ddeff9f4ee56fdcee5f2f21434da8d03428d3563486f68395
font_02_sfnt_off0001cee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEE6 10696 bytes
SHA-256: d611ccf60f763d9ac04c9760df224c87300d30dd4bc39b0a40aab9588ed483cb
font_03_sfnt_off0001f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F346 16276 bytes
SHA-256: c42b0f2c96d19a300150fb9a445a329ee75eb420567d1493d5ba0bff33255d16

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