Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bb26b48c8177ef…

MALICIOUS

PDF

76.4 KB Created: 2021-04-29 19:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5f6115854a70555fec7a859cb60b5689 SHA-1: 21a5e24b88e9203563e618067aa03401e7dd09d7 SHA-256: d5bb26b48c8177ef1cd9c1ef788be7640ca995634aa4d88b3d3e8b757d0d1d18
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or spam campaign. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The primary URL observed is https://druttle.ru/strik?utm_term=de10+lite+control+panel, which likely serves as a lure.

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.
  • 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://druttle.ru/strik?utm_term=de10+lite+control+panel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449009/normal_6000f12cb5dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_6048a574912b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/fhvkIyi/68906891143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_6033008b4fb89.pdfIn PDF document text
    • https://wowererifawop.weebly.com/uploads/1/3/1/3/131384429/4ce4693.pdfIn PDF document text
    • https://kinikike.weebly.com/uploads/1/3/5/3/135324172/009f7.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/cUx9l1O/spearfishing_wild_shark_hunter_fishing_game.pdfIn PDF document text
    • http://nesudad.iblogger.org/cogat_form_7_bubble_sheet.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/zigurapapolix.pdfIn PDF document text
    • https://gejejemimegi.weebly.com/uploads/1/3/4/8/134899280/namulifovaveba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_953ac3e516ae49f2b44c9f73fce49db5.pdf?index=trueIn PDF document text
    • http://wilediza.epizy.com/52849878436.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_1c918b4cbae543b7ba20cd1f4f0d8f81.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_d4e1b8fb1f104526bcd0e0d961033134.pdf?index=trueIn PDF document text
    • http://mupegutiwigo.epizy.com/example_of_article_review_format.pdfIn PDF document text
    • http://sazerubewufuzuk.epizy.com/tuxalosedada.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_71ec7a19333447c38da8333a17ce71e5.pdf?index=trueIn PDF document text
    • http://fivamoxopel.epizy.com/the_blob_full_movie_in_hd.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_aaf91c5821214cf18fc817c5dc8bfdf8.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_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 4940 bytes
SHA-256: be19bfa978e2cd5ffe5ca4ba5c8499db435e0bcadd8d7f9323f53c69cba079e4
font_01_sfnt_off0000fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 10928 bytes
SHA-256: fa2ce69a367077bfbe3bb185ec64c865a3031af8ce286d7c16f1378b47217dbb

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