Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e99d9b842a2ea5e…

MALICIOUS

PDF

80.2 KB Created: 2021-02-25 08:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9188b2b71a8e840af7e0da576c0a62f6 SHA-1: 6d246818eee3dee925959f0ca368943fae27aae1 SHA-256: 9e99d9b842a2ea5e1f999ab3ad059f863b3ec12f66f3a587df7f8313018d76dc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the links. The primary goal appears to be directing users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=how+to+change+my+voicemail+password+on+iphone PDF link annotation
    • https://cdn.sqhk.co/dutararopat/hcWWhdW/dumb_ways_to_die_gameplay.pdfIn PDF document text
    • http://lianhua.life/travelon_laundry_soap_sheetscelxz.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/eghjeCj/bedek.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/what_bible_says_about_adultery_and_fornication.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/HibghVc/gravity_run_3_cool_math_games.pdfIn PDF document text
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/73d20e67.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/serunijuxokazi.pdfIn PDF document text
    • http://gutprod.xyz/xobasotapuzigiknejju.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/how_to_reset_a_amazon_smart_plug.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/this_is_where_it_ends_chapter_summary.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/39710036947.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/cc5cbda.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/Bbgengi/96494466598.pdfIn PDF document text
    • http://espacecmb.xyz/65893441662d6idt.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/gcijigU/my_little_baby_pc_game_download.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/nonufev_silexisidoritet_monizusomekak.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/which_of_the_following_statements_is_true_regarding_cost-plus_pricing.pdfIn PDF document text
    • http://raisinshq.pro/88350660578tqxtl.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/7df202721f0.pdfIn PDF document text
    • http://lighttravel-ng.com/69748495599t8qlw.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_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 5700 bytes
SHA-256: 0736d7219e39bb3953debde47c4b77df60b4ec0fa5109950556066c6b09054b1
font_01_sfnt_off00010e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3F 10676 bytes
SHA-256: eff725f036e49940892facc854df550881243db5660406db32680cc0d75bc5da

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