Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3feb5963660674…

MALICIOUS

PDF

79.8 KB Created: 2021-03-11 17:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bc2384dd7a92b80c2c5757831738e68b SHA-1: 7368b1ea985ff3b427535f8389782197c1e2e66f SHA-256: 3e3feb5963660674d332468ed32033597cce4b6351098ead9554d7efede20272
132 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a specific PDF title, and the presence of a 'download button' heuristic further supports a social engineering attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=wicca+di+scott+cunningham+pdf In PDF document text
    • http://epipog.com/luna_storia_reroll_tier_listko4jg.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/h3iaUPw/texas_instruments_calculator_free_online_use.pdfIn PDF document text
    • http://mivetys.xyz/xapizukufazeseloxizotu6u2tw.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/icjjgiX/starfish_movie_wikipedia.pdfIn PDF document text
    • http://qunit.space/nitufopuratuxy93l.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/6.7_powerstroke_transmission_fluid_type.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zixugikel.rf.gd/cambridge_past_papers_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503e0251-bf87-4f84-b8fc-766600306ce4/82521887850.pdfIn PDF document text
    • http://tobesonev.rf.gd/latitude_and_longitude_worksheets_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97c4a2e-8bf8-44b9-bbfd-8079b79e187c/10126609423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf38351-7ae3-492a-859b-980ae12e56e3/top_books_for_analog_circuit_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e636ec75-846d-464f-9480-629d8ef1c4c9/what_is_a_peer_reviewed_scientific_study.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/the_tale_of_the_two_brothers_story_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4be00e-6a9c-432d-9d87-31bab100a396/what_is_to_the_power_of_1_2.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/1861120031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53b47c9-c7a0-4293-924a-7f35fa9abc78/what_child_is_this_greensleeves_piano.pdfIn PDF document text
    • http://rejaromavovelu.rf.gd/age_of_empires_2_crack_no_cd_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1994d2-5365-4d09-bcc5-31458076ed95/the_crown_season_4_episode_7_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff89fad-f860-4acc-9fea-3d2448c1cbca/80280774028.pdfIn PDF document text
    • http://rakimeramut.epizy.com/88600950920.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 5216 bytes
SHA-256: 63318f3dc0bd5684ae4c2855437460bfc9e03995217722957f0a35609b7469e2
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 10240 bytes
SHA-256: 51390d40dece57c64743f860d5060e49fa600a682d3fe2fe813b17c0561f2b42
font_02_sfnt_off00012362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12362 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34