Malicious PDF — malware analysis report

Static analysis result for SHA-256 053422886622e747…

MALICIOUS

PDF

85.8 KB Created: 2021-04-06 01:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3a7ce2f876902ea765de62da4f368eba SHA-1: 1e680bab564bc77a99034b9b513c03965e519b66 SHA-256: 053422886622e7474866f1ec8edd464a2a30eaa0aefd7b64f90ab85ccc79b1c3
186 Risk Score

Malware Insights

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

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 0.9955

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=bein+sport+soccer+mod+apk PDF link annotation
    • https://cdn.sqhk.co/nexifatogex/jiijhge/dissertation_sur_le_marxisme.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/htvgcia/skyscraper_film_trailer_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/H6jcohi/bekagew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fdfbc69dbe81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_601782d1844c6.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/vogovalomupekajure.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/gUhgfjf/warhammer_underworlds_promo_card_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_602a0ea652121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_603443056effa.pdfIn PDF document text
    • https://mipedurekarano.weebly.com/uploads/1/3/5/3/135321071/nifivenagaven.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/9jijbgi/new_punjabi_love_ringtone_2020_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_60047bc9a6177.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ieicjjh/photo_lab_picture_editor_fx_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fec398a6607a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5fcc2b033593c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_603912625458e.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/6497711.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/jahuR5J/25233835715.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/rosewinikugulapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5ffe4646bdd60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_605f9da597e56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/nogekusevobedenamuger.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/bepanah_pyaar_hai_aaja_ringtone_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rca_rs2664_5-disc_cd_changer_bookshelf_audio_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/acpi_ven_hpq_dev_0004_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/quickbooks_2020_nonprofit_download.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_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 5300 bytes
SHA-256: 84823b52b0c990615060d1f3b1561e2a58f4e90452fb5fe2896bccc971555401
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 12396 bytes
SHA-256: a11c8874bc040d741c195e9957e007399d12c96883fd018c56de0b15e87b5667
font_02_sfnt_off000132cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CF 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8