Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd10daa5ea272cc…

MALICIOUS

PDF

69.5 KB Created: 2021-02-14 09:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7131a714b28bc4049a147a7f6620ef13 SHA-1: 6c50fb44e6f197c5fd96c734d270a08b812ee60f SHA-256: 1bd10daa5ea272cc2d1c54636c8b706744aff0ed2bb8b974e18e2a27b4a6b4ef
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=microsoft%20publisher%20bookmark%20template PDF link annotation
    • https://cdn.sqhk.co/tamikoveken/gjXibhd/cod_recipes_easy_healthy.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/904202.pdfIn PDF document text
    • https://mefifusefom.weebly.com/uploads/1/3/4/2/134266023/nuwezota.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/oicAv4K/water_ring_toss_3d_puzzle_game.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/4919693.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/zogefoliwugikozoliv.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/bigem_puxumupanaxowep_mipapipa_difibixok.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/gcic97m/can_i_become_a_game_developer_after_bca.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/gfHiiii/android_device_care_storage.pdfIn PDF document text
    • https://fobepuwup.weebly.com/uploads/1/3/1/0/131070598/3ff9ba54.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/bghgijd/sandbox_3d_mod_apk_0._3._1.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/3d69f.pdfIn PDF document text
    • http://kifikawi.66ghz.com/baby_murugan_images_hd_1080p.pdfIn PDF document text
    • http://nubigawe.22web.org/52529265966.pdfIn PDF document text
    • https://salovunuwav.weebly.com/uploads/1/3/0/9/130969923/822776.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_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 5464 bytes
SHA-256: 307b0f8a2d105e224cd5e59783230e75d2b865e2288189c1e3ebb029578ced93
font_01_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 10112 bytes
SHA-256: 19c90fba855ba8a85e65674b160b34e948ff1f1d111325b308e5d778ef14e03c