Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f4591cbe9e91b5…

MALICIOUS

PDF

73.2 KB Created: 2021-02-14 06:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d2d0e805f43c02bdf8ba19e65f432216 SHA-1: 346155b2d1a25c588f9898882bc69a16ab16736f SHA-256: 76f4591cbe9e91b5cb5bab5e6211bf66acfbce1aa4d7380f324afd55cd2915bc
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=hidden+figures+worksheet+math PDF link annotation
    • https://cdn.sqhk.co/mogizufofuj/dJqUid3/pixel_world_3d_pc_download.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/b80283.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/tojefurovetaju-zimudop-taramuzig.pdfIn PDF document text
    • http://dikebar.22web.org/best_robotic_dance_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/feilzgc/ptv_sports_live_tv_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/geCkihM/manojifowekisobeje.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/Vhahces/creative_app_wallpaper_ringtones_homescreen.pdfIn PDF document text
    • http://gelivebun.22web.org/respironics_bipap_v30_auto_user_manual.pdfIn PDF document text
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/budubedak.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/8a3bb8ad7a0a3.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/d4203f01700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubadel.epizy.com/29933062628.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5408 bytes
SHA-256: e657c9fca3666156104a300ac2f3e486d9987db8074b8a3211dd6f68b3c68e1e
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 10184 bytes
SHA-256: 5f43bf8fb38227c0a6ed54425371ea622427b7ebd680a53f64232518bfad62db