Malicious PDF — malware analysis report

Static analysis result for SHA-256 3494de07e658a6d0…

MALICIOUS

PDF

91.4 KB Created: 2021-08-07 00:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04e2a48843aaae2cd04d86204e3ee130 SHA-1: 4de71bbce8654d149a6a9dd00f5a6716bdf6c214 SHA-256: 3494de07e658a6d0d9e6184ac1f9f604ce5431d4ead6962ea36643facc1c3c8d
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, with several links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/rosetabov.pdf In PDF document text
    • http://ural-resyrs.ru/data/file/davugemuvibupiwekela.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/66650961012.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9d0e5630f---duzudotudavavok.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/74004021075.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/af7050d3d79f4ad56e0c3bb6bef2a8e1/telumig.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-16/20210516084201971886.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/6481684851.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/pedal.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/pugaxebofewizunebifulubi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af10c3be6e---tijewesifefureb.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/u2ga5f1f2qn2rt0bdukmkd5nl2/70151788255.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/lubavizozawunokemosaguwu.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/10902411373.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/giziwujesibuzubu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1af3e444af---28121415572.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/142be19527c9e4f249132dabcacfc7ed/devalirifamivozibipovo.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/36585166718.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/718778d6eebd576f8ade90dbdbbb8328/jerupelagowos.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/sagojuzomiluzas.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/jemanepexuzopotapusuwile.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/axexajosajovexezapar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=como+conseguir+diamantes+gratis+en+episode+2020PDF 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_off0000f9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 19920 bytes
SHA-256: 9fd231650f550dd23c6868fc512bde46054aec00f4c54c2a67dc119392564fa5
font_01_sfnt_off00012daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C1 11184 bytes
SHA-256: 9111798db50614bbd00697afdd789d52aa2bf7a90b2e330deca8d1db973a7331

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