Malicious PDF — malware analysis report

Static analysis result for SHA-256 2022ac5b08a621fb…

MALICIOUS

PDF

83.5 KB Created: 2021-03-21 02:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d168da164b069470f5f82a611c919a5 SHA-1: 3fb6f4d317bdf518859e374f594d8ef08a49ecfa SHA-256: 2022ac5b08a621fbeda8bfd6131e94420282f4659fe5bdf0cad654780aa3c32b
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 0.9994

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://jumiwimov.ru/strik?utm_term=how+to+practice+first+principles+thinking PDF link annotation
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/1763080.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/7516298.pdfIn PDF document text
    • http://wisitens.online/74494006907348fy.pdfIn PDF document text
    • https://zurudepovog.weebly.com/uploads/1/3/1/4/131438860/rurubew_gutojimire_xalewixipugawa_wurag.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/igLLii4/zibewamowuwalako.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/hglC21r/pujuvisit.pdfIn PDF document text
    • https://cdn.sqhk.co/lezenelu/ehceihd/the_history_of_photography_book.pdfIn PDF document text
    • https://pugerazetowed.weebly.com/uploads/1/3/4/3/134341851/godafobofomod_dareramonedusi.pdfIn PDF document text
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/4db4401c.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/8294881.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/4102834.pdfIn PDF document text
    • https://konovupifa.weebly.com/uploads/1/3/0/7/130775136/2908b376.pdfIn PDF document text
    • https://zunazodofi.weebly.com/uploads/1/3/4/6/134636935/680332.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/jHjhvab/9029561647.pdfIn PDF document text
    • http://creditscorecard.info/vazuzubitioh7d.pdfIn PDF document text
    • http://gerawat.22web.org/17774538657.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/SRgehIZ/free_opener_template_premiere_pro.pdfIn PDF document text
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/mavazu-webivaz-japozevesopevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jegusimiluf.epizy.com/traction_gino_wickman_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/subway_surf_hile_apk_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/jefezakarusodo.pdfIn PDF document text
    • http://luxilim.epizy.com/les_adjectifs_et_pronoms_dmonstratifs_exercices.pdfIn PDF document text
    • http://fuzufoxuja.epizy.com/vaduxilivakevivisedibo.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_off00010991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10991 5392 bytes
SHA-256: 1bd6386c9b29df8063c6cec4aa64a851b2e1015d9545d3148873b5dc3091c9d1
font_01_sfnt_off00011bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 10772 bytes
SHA-256: ed8ff2457da06c4788ed81c83d3a1a78962c8feb0f0e70ce6f784ad84b62f621