Malicious PDF — malware analysis report

Static analysis result for SHA-256 577a6e994f38a085…

MALICIOUS

PDF

64.5 KB Created: 2021-02-27 06:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d48a083bcfad85fbf97548eee182ec9b SHA-1: c6c5d8bb556ac13d50edc185b79dba806642b7ca SHA-256: 577a6e994f38a085c0c2f993367150675f9d3daa0de5cf34f9a72cf4a30ee555
176 Risk Score

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
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/123?utm_term=fender+super-champ+x2+15w+1x10+tube+guitar+combo+amp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5ff393327367b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403680/normal_5fdcf88a86ce4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_60053f1d0a690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fe0296230df6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_60229105c9641.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/dgcmDkj/zudefudodilexerini.pdfIn PDF document text
    • http://datekal.22web.org/how_to_fix_my_gas_hot_water_heater.pdfIn PDF document text
    • http://fovijivil.iblogger.org/interior_angles_of_triangles_worksheet.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/supesuvepo/icicp9J/diversification_in_business_growth.pdfIn PDF document text
    • http://datekal.22web.org/how_toIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gudukupir/10801419271.pdfIn PDF document text
    • http://mixonanax.epizy.com/72076360617.pdfIn macro / runtime command snippet
    • http://mopafanimuwez.epizy.com/59330099465.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/how_to_pair_panasonic_cordless_phone.pdfIn PDF document text
    • http://rokuwesepetab.rf.gd/forewojivaruwexipu.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/35249425372.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_off0000bda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA3 6192 bytes
SHA-256: 7fce00b5b6f0590cd2528af5e8a31499ec01d5cb6eb5455b7e9d306bed6bd92d
font_01_sfnt_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 10092 bytes
SHA-256: 72bf7ea4f474ecc47e7741b68e1bec356293cfefbc0d049958cf74187c007ffd