Malicious PDF — malware analysis report

Static analysis result for SHA-256 31647c4777b3af50…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 05:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5427aa0acea4ec16d4ef51d5516c963f SHA-1: eef93afafa791b465ad3317c3519394041a4f049 SHA-256: 31647c4777b3af50b0303775358a0ec68a21b6ba677f83a070d8ccbe2bc6d38e
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://druttle.ru/award?keyword=lean+canvas+model+sample PDF link annotation
    • https://fagedudadisex.weebly.com/uploads/1/3/0/8/130874641/fofejobi.pdfIn PDF document text
    • http://lngcliente.com/best_free_app_to_learn_sheet_musicor9iu.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/c1ab79324ed3754.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/Dibqjj8/zombie_halloween_party_invitations.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/pirujegefusenul.pdfIn PDF document text
    • http://se-mrush.com/1840271507477en0.pdfIn PDF document text
    • http://prostotit.site/which_of_the_following_is_an_example_of_grounded_theory8mpzq.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/cb8b76df8.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/gfCwvhj/perifokak.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/xejatirer.pdfIn PDF document text
    • https://cdn.sqhk.co/rakuvonume/ies4hdU/26034112743.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/d544524c7280bd.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/jeggOxK/40961167120.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/5700788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6015feae9b9f9.pdfIn PDF document text
    • http://shoes-storie.club/juvivusaloxesonanoscfmyo.pdfIn PDF document text
    • http://help-bluebadgecenter.com/posezawaretepineduxosukeu28b.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_off0000df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 5124 bytes
SHA-256: 39248824f8f020c29c7833e5f6c559b80f2bc07f36d1cfea2ae0d0a3564ede1f
font_01_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 10088 bytes
SHA-256: 3bbd56ff1201f4d996f7ba13fb087a58c2c375f991187db0f9957caf83ea71f4

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