Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4f43b4348064bc…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 21:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 804c787880d4a6c47ccf311b9f3580ec SHA-1: e37f7534b3fcba4d02355f8087d6d98983050e40 SHA-256: bb4f43b4348064bc2e3089f4ddc670b95e2724afb4513acbc27fa32ff607fd5d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=fishing%20lures%20for%20trout%20lake In PDF document text
    • https://vopukuno.weebly.com/uploads/1/3/1/3/131383764/debuzowu.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/xerenirugawaji.pdfIn PDF document text
    • http://jakor.pro/joweninilitokorafezorotisluwjl.pdfIn PDF document text
    • http://hotel-engels.ru/nust_admission_form_for_entry_teste0qpf.pdfIn PDF document text
    • http://hookup154.site/32630624822pvp7z.pdfIn PDF document text
    • https://vakinora.weebly.com/uploads/1/3/1/8/131857586/3eab2ea.pdfIn PDF document text
    • http://shoes-storie.club/household_casebearer_bugguidearbdr.pdfIn PDF document text
    • http://optarfes.com/the_flash_season_1_download_kickassb7v0t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fecf53a272d8.pdfIn PDF document text
    • http://fovuvizoge.22web.org/puruwom.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/the_father_strindberg83yqt.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/6213245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keputeka.epizy.com/captain_marvel_full_comic.pdfIn PDF document text
    • http://vufufule.epizy.com/5168661500.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/6695436936.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/55735091198.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/29305840362.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/sparkle_app_instagram_android.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_off0000dbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 5048 bytes
SHA-256: 86201096b25ec601e4146dc0596f77f34f943c32647f7224610efa7178d25fc7
font_01_sfnt_off0000ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 10240 bytes
SHA-256: dbded0ea3724bc8bc59d3ca7be5f85828087482108d112aa900d4af946655915