Malicious PDF — malware analysis report

Static analysis result for SHA-256 590295a09f6fefa0…

MALICIOUS

PDF

72.9 KB Created: 2021-02-13 13:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 724448acf1719e4cc37a960b6e7a08c1 SHA-1: f3f29033fe378fed73b4388357d08a080f7ffd76 SHA-256: 590295a09f6fefa056585f78f4688ddff5042b6759e9c5dbbc10c01f6154ec8c
186 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
  • 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://leonvi.ru/wix?keyword=probability+tree+diagram+worksheet+doc PDF link annotation
    • https://cdn.sqhk.co/rolizemixij/VpxPjfN/best_gunner_trapper_build.pdfIn PDF document text
    • https://radewisuvux.weebly.com/uploads/1/3/4/6/134689192/7164581.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/Xhfjdii/kijidewopemedimixibanul.pdfIn PDF document text
    • http://universityru.fun/oxidation_reduction_half_reactions_worksheetduzdb.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/9942183.pdfIn PDF document text
    • https://cdn.sqhk.co/waxixojapu/igZCynO/tower_crush_mod_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/dgfiagc/celebrity_cruises_reviews_infinity.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/e6de82825db.pdfIn PDF document text
    • http://natural-shop.info/aastha_1997_movie_480p9k8gg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_601b2a3f490ce.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/83191bdac14247.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/tsjdV4Q/gorez.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/mejawiwomak/iim_ahmedabad_placement_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/gutewaxupolutubiwafi.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/ramsay_corporation_mechanical_aptitude_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/11329323280.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5436 bytes
SHA-256: 557a023b8a813e48e6e4e53721984bd1edb7ad64afa9b4da182477cd16c39513
font_01_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 10580 bytes
SHA-256: 95fa6f7c5ea0713d9b10e74e4ffb83777f4018c19cf8ec57ff91dc0cb85293b4
font_02_sfnt_off0001087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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