Malicious PDF — malware analysis report

Static analysis result for SHA-256 4098b7fb30c53ed8…

MALICIOUS

PDF

68.4 KB Created: 2021-02-24 17:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7a155450ccf6363c6b14d5fc76aeb9b0 SHA-1: 7b37a9e413c075a0950f27670a4bade2c3227d78 SHA-256: 4098b7fb30c53ed8dc49e18ea7861c6309028de4fd8b6059ebb91992d35c0cf1
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://leonvi.ru/award?keyword=danby+premiere+dehumidifier+ddr60a3gp+not+working PDF link annotation
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/32b4a118a.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/4686559.pdfIn PDF document text
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/fapabuwijafud.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/lotugazuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_5ffad28a2dfab.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/4137873075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_603597f88f81a.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/MifHjiy/jafubuzibupugazevo.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/korisitetujaza-rolofalate.pdfIn PDF document text
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/kened.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ff3b9e2a1e60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/hp_laserjet_4015n_printer.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/wanal.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_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 6100 bytes
SHA-256: 7bd2addbf00330ca9b9b239a0d2f55b1e0b9b70f1fac3d83110abb5167c2c16e
font_01_sfnt_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 9948 bytes
SHA-256: 83f84680cba67bf7a245ed33db9b4fe4e2e1c931a4ca0e82b7708d5a7362f2cf