Malicious PDF — malware analysis report

Static analysis result for SHA-256 a047661aee94b4c2…

MALICIOUS

PDF

78.8 KB Created: 2021-02-23 05:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c0c8b7eb39dc7f6fa26fa41e2ce6e87 SHA-1: 523ec1725bb355708645808c67ba1697070b7c42 SHA-256: a047661aee94b4c232985d6971a75c2d2f75537001d9d2260f461ae62e796e6f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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
  • 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://jacksth.ru/wix?keyword=drastic+2.5.0.3a+patched+apk PDF link annotation
    • http://janurikemodowu.iblogger.org/funomikogat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fdfa55a2d7c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_600bb0afebbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_600a677476dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_6022748398231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_5fef46ef9c6e6.pdfIn PDF document text
    • http://teren.fun/gilera_runner_180_service_manualkl426.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/haIuz8v/wordpress_download_all_media.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/icQTjhk/line_of_defense_tactics_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_600a11cac714b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_600be6a276191.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/yggijhe/60609873779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427086/normal_5fde0f4a6daf6.pdfIn PDF document text
    • http://reduslim-shop.website/top_marketing_agencies_in_philadelphiatxqd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496389/normal_5fefd8439a68f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5ff9cf26eabff.pdfIn PDF document text
    • https://cdn.sqhk.co/zifegowuf/hh3idFc/54282226870.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://dinetiwezij.rf.gd/uniden_trunktracker_3_bct15x.pdfIn PDF document text
    • http://bebinuvejaxate.rf.gd/arabic_english_illustrated_dictionary.pdfIn PDF document text
    • http://xasonivuk.epizy.com/dupizewodisabajune.pdfIn PDF document text
    • http://muzeduv.rf.gd/evan_moor_used_books.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_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 5356 bytes
SHA-256: bf5bd54924106ed119d42ccd87784c5fe2c0d02ac113712cdc3a3ddcc12bbbed
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 10964 bytes
SHA-256: 3d0dafdfde935e82baa9c01393e1f41c1487bfe04c1666de041978ce7a736d30
font_02_sfnt_off00011f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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