Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b8e9c962904063…

MALICIOUS

PDF

68.6 KB Created: 2021-09-11 04:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 57df5320e07e15d75f9af6fcaf327dc4 SHA-1: f30b04dde54b309ca895273db90548ef31fdf050 SHA-256: 20b8e9c962904063f7dc1c347f290cd6e10b7b41dd8ff70a434acdffaa3b46f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites, aligning with phishing attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/161320e7223b3d---73081886106.pdf In PDF document text
    • http://simpelms.nl/userfiles/files/xufawetoleso.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/44473644335.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/pakovedukimero.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/gigezemoxuwufedujaxenev.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/29596572339.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/davaveviduwiretu.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/21927274757.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/32838657199.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0860cc5f---pamiminiberivo.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/botudivokaguxedidopuf.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/zazazigifoxogufuwedufezu.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/joralipifazaxowogebun.pdfIn PDF document text
    • http://ropesadventure.com/d/files/57066188241.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/jujisopifa.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/34361378783.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/53887184190.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/11808380596.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/83938140160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=free+video+to+audio+converter+for+windows+10PDF 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_off0000ad1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1A 15280 bytes
SHA-256: 1370ae5d4112545af8a6d716a25690992818a7c49f6e5abda26f9740b9f7a5a0
font_01_sfnt_off0000d3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 10824 bytes
SHA-256: 5fb8a4cec2a5e5e5e09736066676b1a6a2ac79a16eff4f2e10597b9726e18190
font_02_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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