Malicious PDF — malware analysis report

Static analysis result for SHA-256 046b5c8a1b9b12de…

MALICIOUS

PDF

77.0 KB Created: 2021-02-19 23:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a8ff8384b7f1a449df19a43dcc3f7a5b SHA-1: b06b7ce1f559198cec07807c27be20245bf643d9 SHA-256: 046b5c8a1b9b12de9f16364b2e53d8c295ab00c6aeb01cfd88f0d0eeb5bcc07d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=mmx+racing+mod+apk+data PDF link annotation
    • http://mipuruf.22web.org/guidewire_tutorial_udemy.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/xuwisis.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/oxo_chicken_stock_nutrition_information0dkk8.pdfIn PDF document text
    • http://paganel.world/gulevizugamabo9tz7u.pdfIn PDF document text
    • http://fdvsefwfrw.space/arkham_horror_card_game_chaos_bag_appwbie5.pdfIn PDF document text
    • http://ripelavezomosiv.iblogger.org/informacion_castillo_san_cristobal.pdfIn PDF document text
    • https://vurineju.weebly.com/uploads/1/3/2/7/132741272/5762850.pdfIn PDF document text
    • http://raffle.website/el_camino_del_artista_julia_cameron381sq.pdfIn PDF document text
    • http://urolog.xyz/pogimivedefimufejanel1m33r.pdfIn PDF document text
    • http://usmileofficial.site/e-_marketing_plan_7_stepsu1as8.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/ge37ibJ/49868143610.pdfIn PDF document text
    • http://sentytld.online/fukosamuzizupavejapatazaffqf35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatasinunevuto.epizy.com/59079965247.pdfIn PDF document text
    • http://xaxuvep.epizy.com/nepiroxub.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_off0000da9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 5320 bytes
SHA-256: 12b8187bb7ef776b036dd8398b9ccac1914bd1bf5773c0baad6fa02beb9a4f70
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 11308 bytes
SHA-256: 3695685d42949dc79609b597e06c0cd7261d7e6258ad3c467b9ce418771d33a4
font_02_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 16132 bytes
SHA-256: 2def80ee9cf871b89fa1821d83521187f92649b88f41053709a5a2c79b3e7c85