Malicious PDF — malware analysis report

Static analysis result for SHA-256 15935a82a26487cc…

MALICIOUS

PDF

79.3 KB Created: 2021-02-19 10:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f759f015728e4feda46a03b883a74d71 SHA-1: b87e27bf626ab4faa88733bf1621e68887ad3b54 SHA-256: 15935a82a26487ccfdaa0410bafdc4b57ace1303ad5abb616bbd35cbd71fc3cf
184 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 an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one redirecting to known malicious infrastructure at 'https://crophysi.ru/wix?keyword=brittany+petros+married'. The document also utilizes disposable hosting and link farming techniques, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of malicious links strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://crophysi.ru/wix?keyword=brittany+petros+married In PDF document text
    • http://thedouche.xyz/92825442318z8lyw.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/Igjgigi/kawekomamini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_5fd892d3608c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_5fe3b27f9b97a.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/nGhdAr4/75264483226.pdfIn PDF document text
    • http://lienforkid.com/antrenmanlarla_geometri_1-_2gzeak.pdfIn PDF document text
    • http://a-trvl.ru/las_reformas_borbonicas_en_espaa_resumenenzby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fdf86d485ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd34f8a83f00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fee1b28d9c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_6029a9c645934.pdfIn PDF document text
    • http://mamivadusijuf.iblogger.org/self_coaching_101_audiobook.pdfIn PDF document text
    • http://karnaval.host/18700680801robk3.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/h08kghQ/crowdstrike_windows_sensor_silent_install.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_602edb454c009.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/bXhfjjh/wow_special_character_name_generator.pdfIn PDF document text
    • http://tcerkovniekupola.space/baweninoguwutobogizezwo14.pdfIn PDF document text
    • http://livecopyrightverification.com/vogogosunejipefednh7w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_601ba79f3129d.pdfIn PDF document text
    • http://basvuruizleme.online/brainpop_states_of_matter_crosswords2vkb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roluvad.epizy.com/tilelikakaxekoxukufatob.pdfIn PDF document text
    • http://tulazupuvive.epizy.com/hr_budget_template_excel.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_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 5224 bytes
SHA-256: c9128fbe9764b7923824b8fd5d3c879be9bfbf18ab4e978a611c9ff1c8899e5a
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 10644 bytes
SHA-256: 2dbfb44620d79a81daa54a33a2d7ea713ff66baf5b752231c02d96b12be2bcce

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