Malicious PDF — malware analysis report

Static analysis result for SHA-256 9266b577c88c43fb…

MALICIOUS

PDF

80.5 KB Created: 2021-03-23 17:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d2c5309346eddadcd5e0e8634ad8c871 SHA-1: 65e61647fc59cac5cc7fe2f8188bb78a64e65ab5 SHA-256: 9266b577c88c43fbb40501769e08e974c382a30b29be23f1ced2be913314e2c6
244 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as search results, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Barclays premier league fixtures table pdf download', suggesting a phishing or scam lure. The presence of many external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/award?keyword=barclays+premier+league+fixtures+table+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6010488e36812.pdfIn PDF document text
    • http://hrushch.space/puworajagawozuzufafezotae7biv.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ijjqgeu/pegiva.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/h6jjvhb/tropico_6_multiplayer.pdfIn PDF document text
    • http://bilet-pdd.site/dinixureboutimd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_601abbf83d526.pdfIn PDF document text
    • http://cmbmarketing.agency/how_to_play_the_dating_game_redditvssvy.pdfIn PDF document text
    • http://kelnoteres.xyz/betin_kenya_mobile_apptprfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5fe5e6ce62ff0.pdfIn PDF document text
    • http://galoomer.online/45875602764k2p66.pdfIn PDF document text
    • https://cdn.sqhk.co/litanamamusi/Fjcm0ii/vivavideo_pro_video_editor_hd_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/ldhhb2s/dwarf_legend_mtg.pdfIn PDF document text
    • http://contentmedialiteracy.com/zegutubunurijambg7ma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_602d7014844de.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/U7gehjc/mixoxusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_605047a3ea501.pdfIn PDF document text
    • http://maykistore.ru/mandatory_reporting_training_wajjanl.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/ZhjEpzS/winkbed_luxury_firm_vs_soft.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/hejhE5q/street_driver_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_c64432c8322049b18a06d0f5ac594918.pdf?index=trueIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_5d7beb16a3d94b3ba3deeb1852677892.pdf?index=trueIn 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_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 5928 bytes
SHA-256: 073732c0c58b6da8172109b8c40dcc49fdb9ba6aaaf3e1f9c41d0a168cd9c105
font_01_sfnt_off00010fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 10560 bytes
SHA-256: 38b7d4b36746db14e009ccb3a105a01c21a38930a49e8fc65ab4ab321399ec47