Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63755edb4ca7443…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 01:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ed63003010492a28ade94fe8d925b96c SHA-1: e193b24e9f6b136657b22b9e70c8826c95a8c128 SHA-256: f63755edb4ca7443c3eb7719fa06b27149aa519b3f19a5933729a94154c18186
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/award?keyword=how+to+oil+a+brother+xl+5130+sewing+machine In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_603149cce63cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fceeed9dd6f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5ff9b49eb6c14.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/dPhbshi/xilonufejurapejidofinipa.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/igMz90b/vewawofosupaje.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_many_employees_does_macys_herald_square_have.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/liQZhjF/wakopidazunakatexumadomas.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/heNUjha/hungry_shark_world_all_sharks_2020.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/jefopanawimaze.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/jijeihj/37944730128.pdfIn PDF document text
    • http://kupivse.xyz/61441331428hosp2.pdfIn PDF document text
    • http://iblack.space/602485574188f00y.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/ehehh69/arenal_volcano_hot_springs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fc6846cef52b.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/najubu/17194299415.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/amish_tripathi_sita.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/sylvania_portable_dvd_player_charger_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/jemokikukurawixadajex.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_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 5956 bytes
SHA-256: 152c671b5888cda8dd90d9cad1bdba6c697474f0cc2bfde01fd79407541486d1
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10748 bytes
SHA-256: 09d9d3724c6bb835d7a44884d28b22c79ae999d6f4554bc50896bc7a56d2f287

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