Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6eb07eadeab123…

MALICIOUS

PDF

80.2 KB Created: 2021-03-07 12:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2bbf97cec688353b90aa855d4cdb7259 SHA-1: f33a0d2af02260e42e7b471e93029b8b9c3ba51f SHA-256: bd6eb07eadeab123424938afc69610608a4da741b29724228aabb1bf2a5369d8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains references to '8 hole ocarina tabs zelda' and the wkhtmltopdf tool, suggesting a lure to a malicious website. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=8+hole+ocarina+tabs+zelda PDF link annotation
    • https://cdn.sqhk.co/fabozesemi/cb5ivia/clock_face_printable_worksheets.pdfIn PDF document text
    • http://meserowogawak.iblogger.org/corian_countertop_suppliers_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/doghkaq/19144132554.pdfIn PDF document text
    • http://xosudodobuj.iblogger.org/mupojuwokuxoribogajuzixu.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/2df6266e-dd00-4d5a-8e50-43f248fa606f/verb_tense_practice_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/65103504220.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/arya_ek_deewana_full_movie_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fac88b-7784-4aed-9b50-fdc35adaf121/80353737937.pdfIn PDF document text
    • http://xafafogaditeki.rf.gd/87103663327.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/76362371907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc042d7-53f7-430c-8e64-5538e20bbf3a/frozen_2_script.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/pre_calculus_11_textbook_alberta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df03ea4-2818-468e-a7d7-8f39210322d0/wexakadixonevuzawa.pdfIn PDF document text
    • http://xezonadofugas.epizy.com/motomixulovipuxavewijajo.pdfIn PDF document text
    • http://wedimotonolisu.rf.gd/digital_signal_processing_book_by_p_ramesh_babu_free_download.pdfIn PDF document text
    • http://bujoraz.rf.gd/the_drovers_wife_murray_bail_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/fetakuropazaxokedijogafof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750c19c5-6bbe-4ff5-9cb6-076a0ddbf675/xixebetufagoxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed92b52-6382-4312-8d63-10688a9d593e/samofiwenuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bae67f-e612-46bb-9a82-aa20a039db1d/dafejekovog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f37768-8152-4f10-83b7-4ef990f8fe8b/41628014348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02abb2cf-d601-4f91-a1c3-93d609f8fd8a/64465707180.pdfIn PDF document text
    • http://votunekawajobo.rf.gd/87584344717.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_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 5104 bytes
SHA-256: e00071b4bf387bc666e84caaec4c874434773e183fc124f321d581a7b0bbf541
font_01_sfnt_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 10608 bytes
SHA-256: fac9d948c8ce43c754352cd7745c7d57289b089c1746cc4b9ce38370d5bb7d55
font_02_sfnt_off00012507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12507 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c