Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dac5f5bb63ae60…

MALICIOUS

PDF

85.3 KB Created: 2021-02-20 15:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0080b089a2dd3043fca1bb453ecf0a36 SHA-1: d120ec4429b07ed7fa26e9c9f384fb8cd109adfd SHA-256: 47dac5f5bb63ae60336a9d5dafc37a43dcf07a12243b9a038102aca19d3afe8e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary one pointing to 'seumenha.ru' and including a search term related to Australian social services, suggesting a phishing lure. The PDF's structure and embedded links indicate it's part of a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=shadow+minister+for+social+services+australia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410714/normal_5ff2e075bd806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475379/normal_60053efc1021d.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/f41af0d4a334210.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/OieNVnU/final_fantasy_ii_psp_walkthrough.pdfIn PDF document text
    • https://rusulurojexaka.weebly.com/uploads/1/3/0/8/130813489/tupakaxopofasiluk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403271/normal_5fc6dd561405b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_6003331fd1e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fcaa7633e4a2.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/gLjaihe/20449911632.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/2jbnjAp/csda_brookline_nh.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/UjahgB1/64826796134.pdfIn PDF document text
    • http://wopafopu.22web.org/transformao_isovolumetrica_exercicios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipenugixegun.epizy.com/acceptance_of_offer_letter_email_format.pdfIn PDF document text
    • http://mobisojew.epizy.com/votivazet.pdfIn PDF document text
    • http://labiwuju.rf.gd/the_hermit_tarot_guide.pdfIn PDF document text
    • http://dewubutojuza.rf.gd/platformio_include_path.pdfIn PDF document text
    • http://vovugezufined.epizy.com/jsa_template_victoria.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 5516 bytes
SHA-256: 58a368cff92b510e457e3ad33847d4125a6044f8b59d6634bedd676a6c2e0b12
font_01_sfnt_off00010b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 11580 bytes
SHA-256: 73a324b3dae590663c8b5f8bf72ed97fecafb2722b4f0cb831cab8716e0a21a8
font_02_sfnt_off000131ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1

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