Malicious PDF — malware analysis report

Static analysis result for SHA-256 683c1aaac20a17e9…

MALICIOUS

PDF

69.2 KB Created: 2021-02-15 23:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4dfafb6af2aa31beda25ec6ef74fdfea SHA-1: 3fd76b2db2b73326b89087624a9016fd3a64def3 SHA-256: 683c1aaac20a17e90d250e60f9ae2c5b8c083b8b85f802906e68e3fe2e77ff51
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wb?keyword=whirlpool%20quiet%20partner%20iv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5fda2b47a67c9.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/pojed_jexibamozomof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fd1d393b0238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fea10700e82a.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/tajobabuxi.pdfIn PDF document text
    • http://didezidise.22web.org/samsung_galaxy_j2_theme_store_apk.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/manuzifibuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_60168ac0a7ce8.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/c94f9.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/pototuno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renowuvix.epizy.com/gutuxutibajupusuwili.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/28127721929.pdfIn PDF document text
    • http://xusijaxux.rf.gd/dopeguwavijitu.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/zugatirodigobobet.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/7482431169.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/movies_site_for_pc_in_hd.pdfIn PDF document text
    • http://nugetagu.epizy.com/jusijizakaziwamuwi.pdfIn PDF document text
    • http://silapopo.epizy.com/aviagen_hatchery_management_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_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 4928 bytes
SHA-256: 77f7e8c349db7d925fbd681a71790a1b0c93355df8fc86d68747e4d8ada121b0
font_01_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 11292 bytes
SHA-256: e9c7529ef613c7a20b0986355f86250badd02c70b57c46515d07bd57ce9f1400

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