Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23c8b5c88c16dc2…

MALICIOUS

PDF

65.0 KB Created: 2021-02-23 23:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 086725965436437488444e5bf81f401c SHA-1: 52df0b015d5eb1c3154d40416627168a22656ffa SHA-256: c23c8b5c88c16dc211e00929f0d3f471018b9fefcfa18bdb946e2e3b6a1744b3
126 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
  • 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://jacksth.ru/wix?keyword=better+homes+and+gardens+sheets+reviews PDF link annotation
    • https://rimejosokodux.weebly.com/uploads/1/3/4/6/134691074/wizuzovi_lifid_fiwowedaxo_tafisu.pdfIn PDF document text
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/gakovis_garikimuku_maxoji.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/bBCjiii/cake_idea_for_bridal_shower.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/jhUjdjd/horse_racing_3d_1._0._5_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/aSiejar/61866398527.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449783/normal_5fe22f98cdf1b.pdfIn PDF document text
    • https://zezawimikosalef.weebly.com/uploads/1/3/5/3/135329884/9537011.pdfIn PDF document text
    • http://differencecheats.net/reference_contact_sheet_sample7dg25.pdfIn PDF document text
    • http://epipog.com/505781773169zukq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_601bd1e66c320.pdfIn PDF document text
    • http://card2card.live/how_to_set_temperature_on_whirlpool_water_heatersld2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5feaf28e49474.pdfIn PDF document text
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/8137500.pdfIn PDF document text
    • http://ital-tess.space/protein_structure_powerpoint_templates_freex541g.pdfIn PDF document text
    • http://visiblawty.com/vubitudisegarufo3rqg.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_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 5408 bytes
SHA-256: 39a52a9a713dbd224faae505028c97bdcbf71c25f5a4bfcbeb844b148df17c65
font_01_sfnt_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 10224 bytes
SHA-256: 3839e3d30d36363931b4ac52b52f27db43c9abdfc303706907f3a7b76a3d1f08