Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecef96dddd6ec016…

MALICIOUS

PDF

81.1 KB Created: 2021-03-01 19:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c5e396459165101ef3bdf4810d18ad0 SHA-1: d5b5c67ddc34b799f11995f7f62f7ba1d3b1b2e3 SHA-256: ecef96dddd6ec0162e65b448bfec4c38603dffb3ab786a9856285f8ee285ff41
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or scam operation. The document body, though partially corrupted, references "Las 13 colonias de estados unidos", likely a lure to direct users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 https://vilenefex.ru/wix?keyword=las+13+colonias+de+estados+unidos+como+se+formaron PDF link annotation
    • http://websecurer.tech/gotegimudutadinerusizikoqftiu.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/herman_miller_aeron_chair_size_b_dimensions.pdfIn PDF document text
    • http://souve.me/34509521540gzq1x.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/exKhehd/busisuladesakuvadozisibet.pdfIn PDF document text
    • http://speak4pro.com/mipunutixufolalazuxufawvhn4q.pdfIn PDF document text
    • http://sberbank.link/what_is_the_difference_between_all_souls_day_and_day_of_the_dead5i3cp.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/39805796240.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/one_touch_ultra_2_battery_instructions.pdfIn PDF document text
    • http://myyshooop224.site/sigawilumexovajodabubnqed5.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/what_are_the_four_types_of_music_texture.pdfIn PDF document text
    • http://myluckywin.site/rpg_maker_vx_ace_lite_crackvw2jp.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/idtgfB3/98444246486.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/jPjjjjb/36803720514.pdfIn PDF document text
    • http://fkpravo.ru/pokemon_liquid_crystal_walkthrough_orange_islands38aa9.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/reddit_pokemon_go_trade_codes.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
    • http://sinusisokopex.atwebpages.com/7615949430.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/lemudaw.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_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 5204 bytes
SHA-256: 1b2ed052d2ceae67650c32fe66b8de5862f8dbd10256a640d5e0f296c64a8c8b
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 11032 bytes
SHA-256: 507abc1ebf95dc1fa84e73fd92dd66bf1ea29f5da497fe2467d84b9611e50eaa
font_02_sfnt_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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