Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5a7dd0f08e4097…

MALICIOUS

PDF

81.0 KB Created: 2021-03-31 05:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 90596931c3ca75bfa97121c4fd03ec2d SHA-1: 9333576b7c75eb837ca035dc12c40103167f5d96 SHA-256: ee5a7dd0f08e409730a62f14a2def83dbe3a829f7e9c79d3ace3019807a1b0f3
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=does+pa+have+a+cottage+food+law PDF link annotation
    • https://cdn.sqhk.co/ruzudulo/eWfWjaI/android_tv_remote_control_keyboard_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_605801b781ca7.pdfIn PDF document text
    • https://cdn.sqhk.co/julubesaf/he4cghG/sumadepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5fde6466e823f.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/QUgfJvB/como_pasar_zombie_prison_escape_saw_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460063/normal_5fefa9296eb09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jozizirepimetel.rf.gd/14098985423.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_38c037c80439404bb543f830d2dcca22.pdf?index=trueIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_e00942838d3943e987c5d6541bc501bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/what_does_the_streetcar_symbolize_in_a_streetcar_named_desire.pdfIn PDF document text
    • http://tokiwubamiwi.rf.gd/bioremediation_definition.pdfIn PDF document text
    • http://suredutika.rf.gd/nadufiga.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_cf3f9138e5374634ac76d365a3ee08bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/iso_17025_training_questions_and_answers.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_fe92cd9cd63c410da88fb9a908450a6b.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_7fe0652e2fb14d9582fcb4a25c79e546.pdf?index=trueIn 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_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5472 bytes
SHA-256: a6d9e39b953760f4bdb2cfe0d42fbbd2a8827b96ddd0cb535c3f0f4277da05ae
font_01_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 11736 bytes
SHA-256: 27f7fd94fbc07d60820f355c71495877ab203bb9be3ccd578305dfa58e5e8fd3