Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae2c7ce0ac29fae…

MALICIOUS

PDF

79.2 KB Created: 2020-12-05 20:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9ace7f76d11a48f3018a1149db9fd75c SHA-1: 19271b11cdfcf2a284dd9c496b760e72c474fb9e SHA-256: 8ae2c7ce0ac29faef2221702a72179e580a82f059bcf9f3d2c7fa6407cf6c0fa
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded URIs, with at least one pointing to a suspicious domain ('traffset.ru') that appears to be part of a link farm designed to redirect users. The presence of UTM parameters suggests an attempt to track user engagement with phishing or malicious content. No scripts were extracted, but the overall structure and URL usage indicate a phishing or redirection attempt.

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://traffset.ru/strik?utm_term=auron+final+fantasy PDF link annotation
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/4050297.pdfIn PDF document text
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/ribavetuxeronudeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fa6e9e4edb84.pdfIn PDF document text
    • https://fejomuzuzozasas.weebly.com/uploads/1/3/4/7/134748710/rosipowimifegu_sulosokapax.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7702792.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/5092129.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/jubiferekaka/bartender_argox_os-_214_plus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5340ff9866f3fd2f0118d/t/5fc7e45ae6f2ed3f50e00007/1606935642461/46823369038.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/garuda_gamana_tava_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2320837-d47b-44d3-98b3-1d313ece64c4/jududukir.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/prodot_antivirus_for_windows_8._1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc2f9fe3c6ccf69f3c0f9bf/1606613507192/market_value_balance_sheet_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba8241a-a311-4e0c-9a05-717a10569e87/40081359379.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/semoxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 3120 bytes
SHA-256: 016562535695261fa949c20e037b245f776ea9462a3ec0c9e1c8d7b66b64eb05
font_01_sfnt_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 4852 bytes
SHA-256: 83075abd504c9b9cb9e75ccb8f8fc2f098f0bd546ff9a47b563893ed43e8b5e2
font_02_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 18568 bytes
SHA-256: 7133eb9eba31d3ce7d1988d18de40c90f309b8af61955557fea0cde53f690235

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