Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1d5557ed7d7503…

MALICIOUS

PDF

218.4 KB Created: 2021-02-17 01:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 663130377bae59c6932e74327ae8de9a SHA-1: 8211881673b147460efa7381e0d5c706e7c49d2f SHA-256: 8b1d5557ed7d7503a1bada4f02361731b16c7d7abbf86e39b5e7e7db5647637e
154 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs that point to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring the user to click on a link, which then redirects to potentially harmful content or initiates a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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.
  • 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://yafferge.ru/aws?utm_term=little+house+on+the+prairie+episodes+season+8 In PDF document text
    • https://cdn.sqhk.co/walekikem/iicNRG4/nofapuxibokimadijunu.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/RJk9zzY/names_of_football_referee_positions.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/hhftBhb/icy_veins_disc_priest_classic.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/Z3SBgji/unicorn_photo_shoot_dresses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_60247a673ae4e.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/dAxha8e/happy_fall_yall_truck_svg.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/jjjfKbu/31644162484.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hjjideV/desert_1943_wwii_shooters.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/ogg4giY/guduwapotokezeronibatuwek.pdfIn PDF document text
    • http://bigswinner.space/jeroroftuam.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/ghbufrn/84311352348.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/jjZw6jf/4762645849.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/yhzjeja/castle_x_monster_energy_jacket.pdfIn PDF document text
    • https://cdn.sqhk.co/fixakozumad/ibheiaO/loresolevujalepirip.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/h1idlxj/2021_arctic_wolf_287bh_for_sale.pdfIn PDF document text
    • http://bossyonlinex.com/bio_data_formdaxly.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/vMhciiK/dogawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00032305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32305 5184 bytes
SHA-256: b4995942d8fb47dedb8b9beb09fe7d856efbf15eb247f582677c98eb56f207f2
font_01_sfnt_off00033497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33497 11844 bytes
SHA-256: aa993ca1fdb399fe02ad18af282665c1fab563df88b1e4d9bc0d98e81aeddf90

Open this report in the interactive analyzer, or submit your own file for analysis.