Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22d0b00398bd6ab…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 08:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2f86dc1e9c551f4beb322ab5e56ae09c SHA-1: c545625a9bb41a1131173e25ecd586e41c215faa SHA-256: a22d0b00398bd6abc6d69d1c7045d82993e57f1f1e3f9830540315f40d57b9a2
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI and a redirector link associated with a 'free-download phishing' heuristic suggests the document is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated by a tool rather than being a standard user document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/strik?utm_term=hp+officejet+pro+8600+take+apart PDF link annotation
    • http://kupivse.xyz/fuwabawuzuzowavel3c3r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_6032568269541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_602e381a05f89.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/97033035714.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/14971064498.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/2ihdid6/75029231431.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/how_to_locate_a_furnace_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_5fd67f264f881.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/how_to_reset_my_roku_box.pdfIn PDF document text
    • http://dfwshootersupply.com/best_probability_and_statistics_book_for_engineersltjku.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/zgjjbhf/red_ball_world_1_game.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/bhggegp/shark_mod_minecraft_1._14_4.pdfIn PDF document text
    • http://newser.site/kreisler_prelude_and_allegro_sheet_music56l3i.pdfIn PDF document text
    • http://topchambre.xyz/how_much_weight_should_i_lose_6_months_after_gastric_sleeveci5xz.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/rgeLcig/4088746148.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/jiia6sx/crossfire_2_scope_4-_12x40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kobivimelelo/11786837828.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/54510195643.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/52186227207.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/top_free_antivirus_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/bovekud.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/kookai_uk_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/la_rams_injury_report_week_6.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/advanced_sql_cheat_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 5072 bytes
SHA-256: 8efe5c8e9e91dd0917780306b8c1c0ede157a298c6d6e220f114d85f2f6560fd
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 11100 bytes
SHA-256: 1c4837ac361be232b1d395820aec2415b1587e48f014b1cc25fd60f471c61738
font_02_sfnt_off00012792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12792 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230