Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe9edb9c64c641a…

MALICIOUS

PDF

88.0 KB Created: 2021-04-01 05:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 798e734e181cc3c14a6d20b8d628840e SHA-1: c8a07392dae917672493099396928838430833bb SHA-256: afe9edb9c64c641aed83c56a8d20ef0e066a37acadbb093bc00387fa2f7255f7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'mansions of madness expansion icons', likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/strik?utm_term=mansions+of+madness+expansion+icons In PDF document text
    • http://vanimerukaguto.scienceontheweb.net/introduction_to_computer_science_book.pdfIn PDF document text
    • http://neroveruturom.iblogger.org/digital_electronics_questions.pdfIn PDF document text
    • http://svarka-aurora.online/garmin_oregon_600_drivern2l3x.pdfIn PDF document text
    • http://ueuniti.xyz/medanetudotirawofixogoren7268e.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/certificato_di_residenza_autocertificazione.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/cognitive_behavioral_therapy_techniques_for_ocd.pdfIn PDF document text
    • http://lejalabaku.22web.org/44788178997.pdfIn PDF document text
    • http://widawizo.iblogger.org/ahmadi_books.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/7981911614.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
    • https://uploads.strikinglycdn.com/files/23ae42d1-8756-4f7e-92b9-bb43cb61c8e5/fuwomerazowoxixedunoja.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/1001_albums_to_listen_to_before_you_die.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/rumimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ad2d4a-9266-4a56-a7bc-fabd9cb7bea4/the_kybalion_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/day_of_infamy_speech_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f211460-b9b6-428a-b2f2-f0be379adff3/whats_the_difference_between_sonicare_4100_and_5100.pdfIn PDF document text
    • http://davutawopoban.epizy.com/pafipesu.pdfIn PDF document text
    • http://gobavurojifovam.epizy.com/business_report_writing_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9304b86-415a-4d2d-ab22-b68d767f5593/41225630247.pdfIn PDF document text
    • http://fusifovizit.rf.gd/zusorumadozezet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfca860-b24b-4220-b645-ee8a327a6113/ejercicios_resueltos_probabilidad_y_estadistica_6_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/disixukofebiwozud.pdfIn PDF document text
    • http://kitakel.epizy.com/free_travel_blog_html_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/banshee_season_1_full_movie.pdfIn PDF document text
    • http://jifusewu.epizy.com/46690641941.pdfIn PDF document text
    • http://wemikovovafebo.epizy.com/hola_privacy_vpn_app_browser.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_off00010dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBA 4952 bytes
SHA-256: 99e41349df84f8a43e4ad16d6f238b65e36073fdd08339d97310361b6e2b7253
font_01_sfnt_off00011e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E82 10972 bytes
SHA-256: 6103f79ec71d25a779023927eb92b63f36930484ff42bc6b1a4dc5dad91dd463
font_02_sfnt_off000143ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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