Malicious PDF — malware analysis report

Static analysis result for SHA-256 432bd3706e871b7f…

MALICIOUS

PDF

67.7 KB Created: 2021-02-23 10:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b643b24faddbeb7e4672a25d9fae087b SHA-1: 8e1b64ce508d74c96beda8e7e17bf14ed9a4cc38 SHA-256: 432bd3706e871b7f2e59c43592b5b1d733b14dcb9d4796c31fc3f94adda97f39
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the structure and numerous external URLs suggest it's designed to lead users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=shark+professional+iron+reviews PDF link annotation
    • http://tirojegexo.iblogger.org/flash_on_call_app_uptodown.pdfIn PDF document text
    • https://boferisavupase.weebly.com/uploads/1/3/1/3/131384298/ad438d26cfb83.pdfIn PDF document text
    • http://wezotarekexu.22web.org/how_to_start_a_generac_generator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fe3872e360a1.pdfIn PDF document text
    • https://tumazalewiguta.weebly.com/uploads/1/3/4/7/134755417/987c773.pdfIn PDF document text
    • https://fobizolavavoka.weebly.com/uploads/1/3/1/4/131406440/7c7225.pdfIn PDF document text
    • https://zapowiwowo.weebly.com/uploads/1/3/0/7/130776131/jizinugi_lavugok_pusadul_limokexu.pdfIn PDF document text
    • https://zewajala.weebly.com/uploads/1/3/1/3/131398225/dibik_lukit_jixib_nofogiredomixad.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/tipilemuvipovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/love_battle_2013_full_movie.pdfIn PDF document text
    • http://zupamifub.rf.gd/adjective_forming_suffixes_ive.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/first_five_year_plan_of_bhutan.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/42368632740.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_off0000ce9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9B 5308 bytes
SHA-256: e128785f3dc269b88d20494531601d4bc8d23d381c46c32d9a496f6863b19360
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 9844 bytes
SHA-256: ca3896639f36dcd88ffdcda34551cbc9fa8c78059498899daf6562b906d585dd

Open this report in the interactive analyzer, or submit your own file for analysis.