Malicious PDF — malware analysis report

Static analysis result for SHA-256 51da405ccfc903d3…

MALICIOUS

PDF

40.4 KB Created: 2020-11-07 00:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: be20a579ac3eabdffb426366a12a1fdf SHA-1: 6d76989c894c53577dbd2f3f641ba745d20ebf08 SHA-256: 51da405ccfc903d3a25affc9b018f56f7e02ca86dbeddc93d4a02b92acb48a3d
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffset.ru/aws?keyword=converting+to+vertex+form+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fa25cc4274e9.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/9063630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f9a9cdbadea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fa5d0965bacb.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://kugudad.files.wordpress.com/2020/11/download_lagi_ran_dekat_dihati.pdfIn PDF document text
    • https://dowuwiridewe.files.wordpress.com/2020/11/97555239798.pdfIn PDF document text
    • https://japegotof.files.wordpress.com/2020/11/menujorakesobugobagatun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb86e99b-0804-4f09-bacc-3b2dfdcf228e/ac_odyssey_best_mastery_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37418236-11ee-4486-8f3d-6341980525fa/78269557380.pdfIn PDF document text
    • https://tibepitetuj.files.wordpress.com/2020/11/72496833509.pdfIn PDF document text
    • https://tilemidif.files.wordpress.com/2020/11/28127747322.pdfIn PDF document text
    • https://wesodiwizuse.files.wordpress.com/2020/11/svt_3c3a8me_division_cellulaire_controle.pdfIn PDF document text
    • https://kutoxuzute.files.wordpress.com/2020/11/nifedezogutetasumeserav.pdfIn PDF document text
    • https://watupep.files.wordpress.com/2020/11/nozaxibo.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_off000051aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51AA 5244 bytes
SHA-256: e749cb729a07d44edba04ca23a5afa6f280a1e897c0e1e8cf11a07de16032205
font_01_sfnt_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 10484 bytes
SHA-256: a22a56a2ed06ca2a2de033441b3dc58fe42c60d7e492e1c2af750411242c6162
font_02_sfnt_off0000868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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