Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad3e67711c45e2c…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 22:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdeed80ce7e718a5b5032944eead7a03 SHA-1: 2d3d014856cc5a68d9e56c0f478f8474b795301f SHA-256: dad3e67711c45e2c512dbff38c4e5430cd12c59482f8317cf6e73f44c64ae03c
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=blank+facebook+profile+picture+female
    • https://kexekogu.weebly.com/uploads/1/3/1/3/131384418/3100697.pdf
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/567928.pdf
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/dc866097c2dc931.pdf
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/zotapixiwakidi.pdf
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/mawireli_pubijikiz_kesafim_judivu.pdf
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/fowexotilum_fototez_sumazidudi.pdf
    • https://tetomorefaboma.weebly.com/uploads/1/3/1/3/131384600/f240a997bdbf9a.pdf
    • http://gemajesubon.22web.org/asset_management_software_free_for_android.pdf
    • http://rezltml.xyz/gemodirufenerirolomoposgtf2x.pdf
    • http://siwupezomejen.getenjoyment.net/form_4473_question_11_facebook.pdf
    • http://nomokesus.sportsontheweb.net/population_census_kenya_2020.pdf
    • http://fipuvel.iblogger.org/what_is_the_moral_of_the_story_three_questions_class_7.pdf
    • http://teenagetutor.net/income_statement_and_balance_sheet_solved_examples7qdl5.pdf
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/7889157.pdf
    • https://kefavemi.weebly.com/uploads/1/3/4/0/134042724/judipisilipa.pdf
    • http://pycnidwzxc.info/99704661333p28oc.pdf
    • http://opensalle.xyz/samsung_galaxy_tab_a_sm-t580_caselh9j7.pdf
    • http://teksalon.xyz/nonikubibuveboed8iu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pibabopuduj/definite_indefinite_articles_exercises_upper_intermediate.pdf
    • https://s3.amazonaws.com/lofese/american_society_for_aesthetic_plastic_surgery_annual_meeting_2021.pdf
    • https://s3.amazonaws.com/bubodeliza/new_jersey_unclaimed_property_reporting_guidelines.pdf
    • http://dojafeduzig.myartsonline.com/types_of_exercises_for_seniors.pdf
    • https://s3.amazonaws.com/bofake/ponujuzinulade.pdf
    • http://tenavugonotaj.rf.gd/star_wars_imperial_march_trombone_sheet_music.pdf
    • http://delifas.epizy.com/dish_tv_guide_search.pdf
    • http://lijowavatajo.myartsonline.com/83765007884.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8f.bin
aa4fbff07cabda1c86b2ab41dcf81b90926da69c5079df65f32e3e18817e2e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 5236 bytes
font_01_sfnt_off0001014f.bin
818f17da5c9cd2261e0ed751819cf8ab20e5093cfa158c9298360dd5700434bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 10028 bytes

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