Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9d54f23c0a483a…

MALICIOUS

PDF

90.7 KB Created: 2021-08-04 02:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 77676fc5a46dd161d488c98a71c60b5b SHA-1: b572189f7f6c881c014f86ac19310434b4eab5b6 SHA-256: bd9d54f23c0a483a237145055dcf1d116df24a842c4bccd1a189be93fa6df220
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, and one specific URL that appears to be a lure for downloading movie files. The presence of multiple external URIs and link farms suggests an attempt to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://nomylo.ru/uplcv?utm_term=jurassic+world+3+full+movie+in+hindi+download+300mb PDF link annotation
    • http://greenbiotech.vn/uploads/userfiles/file/pujunevelelewirebem.pdfIn PDF document text
    • http://chongros.com/userData/board/file/mapoxo.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/4197770083.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d316dabef5b---18039784504.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210608155542.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/letewodajelilere.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/kumarozoxisuwole.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc642f2a950---kotetekoj.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/29275049956.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d027e51be16---2303753378.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/7h17eu9hcifhu76v1hcmjoavmm/20216622240.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf08d7ec3---84066540359.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/98905309015.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/nutizejokajizu.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8ff4fe15---zopalavufasexo.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/sakevena.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/patulapotovibezadupogiz.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4ce3b3325dee72b5ddcba702d9fb843/liwalitakumopapebivi.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/dunofexosifagawinuxuwuvat.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a3169d5b75f---78899695789.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/9511011590.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/nisasekavokedinofiv.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/klrcqqc2aqdt8e3or24k8qsr5n/5960956656.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de6999163---18816950119.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_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 11320 bytes
SHA-256: 3cc3b3ec4f660a0edd7dbe61e238332152bbb8e0e021a40ac66752c8309fbfa6
font_01_sfnt_off00011660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 17324 bytes
SHA-256: a55866a089eea2cffaf208c17b634c4eba1de64c82d42370418ebee853d2523a

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