Malicious PDF — malware analysis report

Static analysis result for SHA-256 de77f09a0471b258…

MALICIOUS

PDF

71.6 KB Created: 2021-02-25 16:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86f559095ee3cdcc0c9daf80a9625045 SHA-1: 8ede33aef75135d481c6e5004bfc0202c889b020 SHA-256: de77f09a0471b25818c85ba5a3467fef7e823e934288f9030bc89a6ad6d4a61c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=ambiguous+case+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/waxolulum/ihVS4ii/diced_green_chiles_walmart.pdfIn PDF document text
    • http://artistichomesolutions.com/cowboy_chicken_frisco_menupnx7n.pdfIn PDF document text
    • http://fabulouss.space/mofeduxazomitaruguxea4f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60145eab1ec3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_60208e36063d2.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/fG6LjfN/50332990945.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/gdrheib/84002804851.pdfIn PDF document text
    • http://udilische.club/jungle_adventure_nyc3td5d.pdfIn PDF document text
    • http://sandwichhq.club/26957470402v3vzf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469349/normal_5fda415606963.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/50037805858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fdb8eb70be6f.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/9jiidgc/clash_royale_hack_free_gems_generator_no_survey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/61674379570.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/linkedin_advertising_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/65822674210.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_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 5820 bytes
SHA-256: 1cd2e0b59d6b7fdc59a840eacc73d2e8963f1e2a481ffba9644d4e0c39d143e0
font_01_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 10408 bytes
SHA-256: 210281d2d7068b790e4e9c67a59f9ef9f08cb41321c9418f58ff6b819f22fb66