Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9178a8445239bf3…

MALICIOUS

PDF

92.9 KB Created: 2021-09-07 17:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1565ec7e1e9c8fecf9ac443702246f0a SHA-1: 09ce23d0afde0ad0710a756a7c01824208d6f9b4 SHA-256: f9178a8445239bf39afaa0ddb85636d1601d7d8190e7de6aa8bd0cb7c1bab9eb
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=makalah+interferensi+cahaya+pdf PDF link annotation
    • https://alnahamgroup.com/userfiles/file/duziduzisefozididixiwalub.pdfIn PDF document text
    • https://ahha.az/userfiles/file/75873636863.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/nusufakidijiwijit.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/27184662846.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b5a0c401b---pupofir.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b860615188e---latuvafujo.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf861b58f9---92139434310.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/97636395871.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/woretorifirileb.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/zesalutuxewojekobivubut.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/595590396.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612552f4c5c1e---42757746164.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/773e78f6ce0fddf4a72ef2807032bc6f/9002844794.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/niwaxifogujopariv.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/40601764202.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0686916f8---29297371830.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/u24i8t4iq0s49glvtpufitfj35/tuxirapom.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/40777053821.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/90653875132.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/42077704115.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acc84eb83e---98572767849.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/zevebobesekejito.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/nelutigamorexi.pdfPDF link annotation
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/65braem7ro56kq218vossgcl3a/42791958005.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 18660 bytes
SHA-256: 1380f8aa1aed2bedf1044f69dedea69dc35e4700d4738d848bb0b463a79eddc8
font_01_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10796 bytes
SHA-256: 488c3cf09736b1f46766a3c3e8be3d0d16fbd6bae84f5b9bad1be4812cae7fe0
font_02_sfnt_off00013753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13753 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_03_sfnt_off00014cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.