Malicious PDF — malware analysis report

Static analysis result for SHA-256 194679eda9091441…

MALICIOUS

PDF

82.2 KB Created: 2021-01-18 16:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 26e13b48040af9501de2fead3bc0d396 SHA-1: 2ccdf1a41a361f356a736d4b7fb9d99d2bc085ed SHA-256: 194679eda9091441b0f2dbd76c764d7d1b95ac5dd10d339e2701371b97eea910
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document's content appears to be a lure, using a 'Declaration of trust beneficial interest template' to disguise the malicious links. No scripts were extracted, but the primary attack vector is likely social engineering via malicious links within the PDF.

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/aws?utm_term=declaration+of+trust+beneficial+interest+template In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_6004b112ade41.pdfIn PDF document text
    • https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/rubezogupizazu.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/a43d7794754.pdfIn PDF document text
    • http://tiwirodizefa.iblogger.org/postnatal_depression_assessment_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5ff1c030375d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fc21e50707e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f927eaaa7df7.pdfIn PDF document text
    • http://vinuporabomod.iblogger.org/chimpreport_south_sudan_news.pdfIn PDF document text
    • http://zekoselu.22web.org/auto_clicker_typer_1._0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tujiritam.epizy.com/putivukijatapititepojizux.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/zaputavu.pdfIn PDF document text
    • http://gozudivigel.epizy.com/jixazebekifejesil.pdfIn PDF document text
    • http://lifarodanudu.rf.gd/jesojesobatiruz.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/blessings_of_bebe_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/19188814406.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/ligukopazeseputazo.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/89357770801.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_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 5184 bytes
SHA-256: 369b51b85399e44194a8b9b0cdb2d8dd2f46045483029465ff9601a65298d515
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 11112 bytes
SHA-256: eccb7dfb6fb9416c72ea5919f6830312721ce0f3ef01f34ee571de2d1710ff19
font_02_sfnt_off00012ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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