Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f0067dfc22d76d…

MALICIOUS

PDF

79.5 KB Created: 2021-02-06 18:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: eb7513ad5582453aeb6cd82e96038dc9 SHA-1: e627911e0c35fe0bbd6cffe4a8127990def5e2ed SHA-256: 65f0067dfc22d76d32d65fb76d1a7ad51f7248f6fbf93c4bc884d431d51233b3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with several heuristics indicating a link farm and suspicious lures pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://leonvi.ru/wb?keyword=barbell%20medicine%20template%20review PDF link annotation
    • http://esclick.pro/the_wolf_among_us_game_ps4spslx.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/9491753.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/2279869.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/eij2U9A/4_pics_quiz_answers_level_6.pdfIn PDF document text
    • https://vesevowix.weebly.com/uploads/1/3/3/9/133987154/2308216.pdfIn PDF document text
    • http://gotesesevuzi.iblogger.org/senobuwuwekemuximubodewe.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/6552995.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/girar_pantalla_android_9uebw9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerepigov.rf.gd/futut.pdfIn PDF document text
    • http://dufexisoji.rf.gd/shiva_cartoon_hd_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/95222860660.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/wozaxobipas.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/6500629110.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/butesenuvipapepefenumazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/farisixeruzigu.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/j_phys_chem_letters_template.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/nutrition_information_milky_way_mini.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/cv_template_uk_2018_free.pdfIn PDF document text
    • http://puzujudu.rf.gd/30320705710.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 5384 bytes
SHA-256: 5dc18b9250c0317e3dfdeff1b8cc4d23658b2ad9766c51ab111113d3e625049a
font_01_sfnt_off000109fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 11448 bytes
SHA-256: de988e8c4755622aa149a73879ef27c82730af72dc1d8daeaf09de7904e53b81

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