Malicious PDF — malware analysis report

Static analysis result for SHA-256 436d1abc2e698061…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 06:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2d4e51efe9cd8d3fbc0356bfdabd65ab SHA-1: e59d73772745b3abbc105f1e20bf66463c447007 SHA-256: 436d1abc2e6980610408aca7939b040bc73aeea26e604bdc52e3ec29393ca084
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable hosting or redirectors, indicating a phishing or malware distribution attempt. The presence of external URIs and link farm characteristics strongly suggests a malicious intent to redirect users to compromised or malicious sites.

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
  • 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://baarspo.ru/strik?utm_term=delorme+inreach+explorer+two+way+satellite+communicator PDF link annotation
    • https://cdn.sqhk.co/zudilubal/gc3hDhc/9516142982.pdfIn PDF document text
    • http://fevozogu.iblogger.org/sagogoruzidotijadeno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_5fca83117ada2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fc905f07a115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fd7f25705c28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6021a3f9c7068.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/jiR5Lha/36781961364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fe3607d872b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_601a821aa8432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_601dc4eb3e7db.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/tufitijinexu/full_form_of_mla_in_marathi.pdfIn PDF document text
    • http://tuludipetowizad.rf.gd/dumerotogirisipes.pdfIn PDF document text
    • http://meganafekeki.epizy.com/fovipakesesevakifoli.pdfIn PDF document text
    • http://nefigubisi.epizy.com/avanza_2012_putih_manual.pdfIn PDF document text
    • http://jabepekepino.epizy.com/frequency_polygon_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/19045710021.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/75034653128.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/guided_imagery_pain_definition.pdfIn PDF document text
    • http://tikisomoxo.epizy.com/bendix_king_klx135a_installation_manual.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_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 5432 bytes
SHA-256: 708b896151a89608195cfb8a452b4b895eb79b457b7f2f3a5581dc14e372391d
font_01_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 11168 bytes
SHA-256: 33a41d64ede5b7e6719298e41328b4ba7dabfcc7227c981aeb6b50a94cb43831

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