Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddd21b59e40ac4f…

MALICIOUS

PDF

79.9 KB Created: 2021-02-25 06:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 25a6e15e6fbf2169b0fddac3316e1c98 SHA-1: 37f4206f7dcdc2351356635187b954d9a4dd7f29 SHA-256: 7ddd21b59e40ac4f96ce7ab47ba3c47be0f896cc27b90598707b0560d20d1355
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous external URLs, indicating a likely attempt to redirect the user to malicious websites. The presence of embedded URLs and the 'link farm' heuristic suggest the primary purpose is to drive traffic to potentially harmful 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://druttle.ru/wix?keyword=mortal+online+mage+starter+guide PDF link annotation
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/gefezuluropuro_lirelem_tariwugan_tetiwijadajo.pdfIn PDF document text
    • http://monstergym.ru/69170844795edpfq.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/fhggho9/14858656284.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/gowiburoba.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/change_master_code_on_vista_128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5feb7c896068f.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/xujed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_5fe7bbc33d878.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/2jjOr0A/70012800015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fda5952e9f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fea2b7837e07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5ffdc52d22bd0.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/what_is_the_structural_difference_of_dna_and_rna_brainly71x22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375694/normal_6005e43ae5676.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/f3b621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_60247522bafac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/bujirifixufokanaga.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_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 5148 bytes
SHA-256: 486eef2e93595149742455a033756547ef5415ed073a9c643dafa3142b556651
font_01_sfnt_off00010f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F99 10104 bytes
SHA-256: ce2d06776790851faa9a0cab295fcc9b8ab4ea07a89720c41f39e9afe1eb7330

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