Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cfc38d68c6148b…

MALICIOUS

PDF

67.4 KB Created: 2021-02-18 14:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 238bd2fef738e38c7bf0a8459911f814 SHA-1: c929fa02195b68c922707500c96866fdefb46255 SHA-256: 58cfc38d68c6148b859ae52f0e724b1e654e566e4efb466388fd3bf8e25945d9
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/wix?keyword=polar+cave+mashpee+menu In PDF document text
    • http://widevuvi.22web.org/dicrotic_notch_on_arterial_waveform.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/cEjeZgp/54734696256.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/2053841.pdfIn PDF document text
    • https://mamapesuwilataj.weebly.com/uploads/1/3/4/8/134857931/e7bfd67f211.pdfIn PDF document text
    • https://tivositazevuzin.weebly.com/uploads/1/3/5/3/135349871/9902836.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/RiiBfFp/modern_warfare_warzone_battle_royale_gameplay.pdfIn PDF document text
    • http://tomorubi.22web.org/mogufewa.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/gfij3ie/deer_hunter_2018_online.pdfIn PDF document text
    • http://vemonubamupol.iblogger.org/bloomberg_add_in_excel.pdfIn PDF document text
    • http://dubulus.iblogger.org/femojupepudakilonijofol.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/varoximu/nitawofirubuperajodalosiv.pdfIn PDF document text
    • http://dulizarunagisu.epizy.com/fafuzup.pdfIn PDF document text
    • http://pomezup.epizy.com/2121383842.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/college_board_ssd_coordinator_manual.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/zilukijuluxu.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/certified_information_systems_security_professional_study_guide.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_off0000cb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB32 5232 bytes
SHA-256: a63335d729b8641e62661ae20f7e0302789238f35014456bf642d1aa9efaf6b0
font_01_sfnt_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 10384 bytes
SHA-256: 1311134e9512f225eff6972030ef657ea13d3b3363100d6cf7de099ac7be2711