Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe2acb024fe1a30…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 09:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e817825f5b35d177f9c53ebbee8bb21 SHA-1: 1e345198e21ee597fca4b9e9d2cba444c137e719 SHA-256: 6fe2acb024fe1a301283764143d4c1617edaed75b5c07828d9f083cfb6371e54
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 0.9995

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://baarspo.ru/aws?utm_term=roland+spd+sx+manual+en+espa%25C3%25B1ol PDF link annotation
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/1601865.pdfIn PDF document text
    • http://subbellassecret.com/julian_calendar_2019_calculatoraapin.pdfIn PDF document text
    • https://ximazaka.weebly.com/uploads/1/3/2/7/132712593/neserisuj.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/19957281052.pdfIn PDF document text
    • https://ponivigaxuk.weebly.com/uploads/1/3/5/3/135313456/domevewugeruz.pdfIn PDF document text
    • http://carins.info/fafimalemazudekaww04e.pdfIn PDF document text
    • http://sberpodarok2020.online/tank._io_unblocked_at_schoolc67s3.pdfIn PDF document text
    • https://nikulagoronol.weebly.com/uploads/1/3/2/3/132303117/7141251.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/teeth_look_whiter_after_flossing.pdfIn PDF document text
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/tojosata_safis_pizomekopis_zodebemomajumi.pdfIn PDF document text
    • https://negopipeminote.weebly.com/uploads/1/3/4/8/134885603/4502074.pdfIn PDF document text
    • https://rusolozotiwar.weebly.com/uploads/1/3/5/9/135992237/6588995.pdfIn PDF document text
    • http://lovewaits.ru/ancient_civilization_persian_chart78a38.pdfIn PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/finamixizavuzad-dirulevivewona-gijavuf-mafegiwajo.pdfIn PDF document text
    • http://timinome.getenjoyment.net/how_to_add_memory_to_lenovo_t430.pdfIn PDF document text
    • https://juniverobov.weebly.com/uploads/1/3/5/3/135317499/kugaxasafeduwumumo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidilud.rf.gd/dr_phil_website_personality_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/sifepemorovupozabupi.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/do_you_get_a_formula_sheet_on_the_sat_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/wakugolositobu.pdfIn PDF document text
    • http://funuduki.rf.gd/2015_chevrolet_impala_lt_owners_manual.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/63727223433.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_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 5296 bytes
SHA-256: 097696571b6aae58424725039d8993245ea7b66a6c03d268c11563cb9dc3ac92
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10324 bytes
SHA-256: 5e80adc84e6b9aed5a80a9289fca302f64f1c53f610ebc4b44acda68060636f7