Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15be2aea322a50c…

MALICIOUS

PDF

79.2 KB Created: 2021-07-25 12:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4474d9c444b41415f18fcfc71e07f9d7 SHA-1: ada420042f17fffa99cf5073ae93b32b87dd9d0f SHA-256: f15be2aea322a50c274dfe967e286d3ca7c5bdd4ed4df9a712945eedb442812f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de64d035df---faxozadugi.pdf In PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160986ffabdf2f---97719353942.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57f9a4f598---62653460670.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbea6033c0---12314089448.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210616172155114428.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/savobozeka.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/79172366019.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/pewoga.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/wefupokekumo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/5f62828536d42ba720ec0361f15c347d/kixerukax.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/filareladosunominakefufof.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/22008700293.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/27930958539.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c415ae2a0f8---35546919472.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/67668368160.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2232e79ddd---53685911740.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ee82f255a2a0ef515569a7d11190bc45/40478467210.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/fatala.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/wezofovefopuzupipudonu.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/87a56b41269c8db5c38adc8939f831c6/zenakubane.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/rijomaxab.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/96676048809.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160717c872022e---95618418051.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=descargar+manual+de+carpinteria+en+aluminio+pdf+gratisPDF 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://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_off0000ceb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB3 11064 bytes
SHA-256: 8103425d23b734fdc387fd73c2c293a76c46e7fea470908b00aa2a512ba10578
font_01_sfnt_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 17340 bytes
SHA-256: 3506b39fb69bf31d6abc441d2869042d278285936dd406d317cb6d4dee94b123
font_02_sfnt_off0001141e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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