Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7fff6579293a3c…

MALICIOUS

PDF

77.0 KB Created: 2021-02-28 06:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9d7e7ca337921a2128f520f5e8c16948 SHA-1: 62925623e741fe8e6a76750b040a317a76459306 SHA-256: be7fff6579293a3c53a4e5f422e29ca964e05be08a42b6a58fcd3855bcad372a
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=superlearning+book+pdf In PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/dewagono_remiwa_figesuretupig.pdfIn PDF document text
    • http://discovljzg.fun/lupewevuxitamemufimi7s344.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/sulizenomemeboti.pdfIn PDF document text
    • https://puxetesotomu.weebly.com/uploads/1/3/0/7/130739839/f187271af4.pdfIn PDF document text
    • https://gexurowi.weebly.com/uploads/1/3/4/5/134529019/mofaxed.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/gamexamexusi-govaj-kagulopadedevut-tebijed.pdfIn PDF document text
    • https://numuteje.weebly.com/uploads/1/3/4/6/134683694/muzife-guxizig-tibafegew.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/6acf4.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/wolujirewu-filibezelaf-pakuzasinazoj-jabipofatiwub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481676/normal_5fe0a4ada8b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_5fd6af842831d.pdfIn PDF document text
    • https://xegadoponuxi.weebly.com/uploads/1/3/0/7/130775279/3963864.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/3072223c.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/simamupawe_deramiga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5ff1b2f460d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 5336 bytes
SHA-256: 59672688932b655454758d4f2d858c20390d383801246a40c6039762c84ae4a1
font_01_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 11148 bytes
SHA-256: a3109b494e3ed58393074577360a84eae5f4a1a2e033451c391453e69ee97477

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