Malicious PDF — malware analysis report

Static analysis result for SHA-256 3122d34f04003a74…

MALICIOUS

PDF

88.5 KB Created: 2021-07-24 19:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a55a9077221153d22cd0d93c27dae25d SHA-1: 8f145ae8996b60a8707d9497f78592768046a165 SHA-256: 3122d34f04003a748a4cd2a66bd472e83019128fab1355ac21588adfc8174136
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. The presence of a link farm and the use of compromised infrastructure are common tactics for distributing malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/7a5d35a49d57e41fb19d579d4c615a5c/matipuwitepebazuzosomuk.pdf In PDF document text
    • http://fertilityupdates.com/userfiles/files/zipajojilubufuninojaji.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1452339b---zejilezoginateramefamon.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/sodurovabapuxewexujawazug.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/52809937701.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63ac4f38ed---94226305109.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/pedalusesusob.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/nirilodusova.pdfIn PDF document text
    • http://millecolori.it/images/file/57329892482.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/banita.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/83148020792.pdfIn PDF document text
    • http://aps-mes.com/files/file/rukutigisomixikuluwewino.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/dotawididosutagirejez.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/60524844213.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/d20252c0627b72711bef0981eca6ca19/65430218095.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/bijavajejovefuxegigup.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210723124421.pdfIn PDF document text
    • http://anm-av.de/uploads/files/sepijezepoludusom.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/23318888969.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/6652911951.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d283379afe---28964231738.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e93db0e9---44263744086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=stereospecific+reaction+mcatPDF 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_off0000f6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED9 10668 bytes
SHA-256: 050cac57664e3a1b3e48f467cb87a45b32cb3c20b61cd5ca6fad195c1144b254
font_02_sfnt_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 16856 bytes
SHA-256: b4c164887bff1e11beb13850fbd71b4594fdcb7070ccb844c6f3be8fc5d6a3a9

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