Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd5d2f53faea4e9…

MALICIOUS

PDF

88.1 KB Created: 2021-03-27 17:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23f77c923d50a4882ec2c027fa986f77 SHA-1: 9290d90d1ce9207b05f495362ec2e6225d2ecc0a SHA-256: abd5d2f53faea4e99e38e9793192b1bd7cfd2db401cf7f02f80f4502b60b208b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9964

Heuristics 5

  • 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 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/wix?keyword=science+10+electromagnetic+spectrum+worksheet PDF link annotation
    • https://cdn.sqhk.co/bapisolel/Vjjhchg/tepesumatipibowuzudeg.pdfIn PDF document text
    • https://wefopizek.weebly.com/uploads/1/3/4/8/134849363/dc4de320.pdfIn PDF document text
    • http://politach.com/70337882226s9aq4.pdfIn PDF document text
    • http://ergors.space/sumomijejegeje88rfh.pdfIn PDF document text
    • http://pukutabutosu.22web.org/free_excel_vlookup_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/Uuggida/how_to_completely_remove_flight_simulator_2020.pdfIn PDF document text
    • http://totalcreditreport.info/adavilo_anna_film_songsej6ys.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/gexaza_fapizujozetoku_lanetoxo_basevugugabuj.pdfIn PDF document text
    • http://vewosebavukuwe.iblogger.org/gikabujonatanewi.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/xizekekozufexizk1ehc.pdfIn PDF document text
    • http://pannochki-art.com/dell_optiplex_790_motherboard_bios_update8gq03.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/dujubedumuje.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/62961429271.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/xebes.pdfIn PDF document text
    • http://flipping-car.online/what_is_the_energy_of_any_moving_objecteadem.pdfIn PDF document text
    • http://creditactive.info/6373650942481omb.pdfIn PDF document text
    • https://cdn.sqhk.co/purawewus/fidUQij/gifiseg.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/gfwugc0/pet_wallpaper_hd_free_download.pdfIn PDF document text
    • http://cardioactiveuficiale.site/39556700964gg6gu.pdfIn PDF document text
    • http://pop-marketplace.ru/rapid_spanning_tree_protocol_timersmvxjj.pdfIn PDF document text
    • http://ductsunlimitedins.com/kukuvedoxonatudtwgqj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/best_android_games_apk_site.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/19792538530.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/25483533940.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/72701634807.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/79562630462.pdfIn PDF document text
    • http://sezirinizisa.rf.gd/74439883062.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_off000116d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 5800 bytes
SHA-256: b24935e52517fb9936f4c539b47ef868dbbb58084be1ffe18621fccb747c4e33
font_01_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 11668 bytes
SHA-256: ce53cb776708e33fb03a36ae6dc75f502a8456fb915e8205122fd7e0cab17f0a

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