Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e716d06071c05d…

MALICIOUS

PDF

83.1 KB Created: 2021-03-09 14:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 94c71df2a4c53dc87850b14fe7a05664 SHA-1: cf35729eadb6d4fe4e5a96124b3e17d5a9476fa2 SHA-256: b7e716d06071c05d3ab604ecba842ce55e3daa9a761f166c1e53dfc8d50020b5
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/aws?utm_term=oceanic+pro+plus+3+computer+review', are designed to lead users to potentially harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=oceanic+pro+plus+3+computer+review In PDF document text
    • https://cdn.sqhk.co/todipageb/Biehbk7/32157440502.pdfIn PDF document text
    • http://tukazijib.22web.org/b._ed_application_form_2018_in_mp.pdfIn PDF document text
    • http://redirunna.xyz/attack_on_titan_season_4_episode_2_release_date_ukj3mji.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/Knltcjj/need_for_speed_rivals_ps4_review_game_informer.pdfIn PDF document text
    • https://cdn.sqhk.co/remavaveso/LYjcihg/download_king_tongue_hack.pdfIn PDF document text
    • http://pusaburuku.22web.org/mulejenanutazidaro.pdfIn PDF document text
    • http://igcopyrightverify.com/aston_martin_db9_gt_performancetohyc.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/hfvji3b/wisconsin_truck_license_plate_stickers.pdfIn PDF document text
    • http://maximizator.xyz/56862763917pm1d4.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/2hijejb/speed_bump_car_crash_test_speed_breaker_challenges.pdfIn PDF document text
    • http://trackcreditscore.info/xidotelavenugalozitwg5af.pdfIn PDF document text
    • http://copriyghtconfirmed.com/jatapojejovuc2hz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5248cbaa-2b4d-4a00-8556-38b73889c5e2/nekofowomati.pdfIn PDF document text
    • http://posesesu.epizy.com/givejodilutokud.pdfIn PDF document text
    • http://wekijedi.epizy.com/ucc_128_barcode_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6763396d-0aba-4250-9dfc-3e57700fb733/optiplex_780_power_supply_reset_button.pdfIn PDF document text
    • http://venizowazuzi.epizy.com/93239290929.pdfIn PDF document text
    • http://busugotuwege.epizy.com/kitozukubekut.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/75905015963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc338d9b-b8c6-404d-8281-f148879140da/dudolewuzozijolot.pdfIn PDF document text
    • http://tofisazo.epizy.com/70-411_administering_windows_server_2012_dumps.pdfIn PDF document text
    • http://fozusiraviwip.epizy.com/foliage_report_2019_wisconsin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e600ac-e502-45ee-b156-1d709ec8c4fe/44556045534.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_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 5424 bytes
SHA-256: 91ff024a1d42c9360f19148ab7d15543ffcaabc1df574f8ccf033fedf6d78b6b
font_01_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 16416 bytes
SHA-256: 9dd29dbe4798cd79d57333ae83342bfeb6b9f1a8224a991e5ce4584e0d24712e

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