Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f204654d23cd29f…

MALICIOUS

PDF

80.3 KB Created: 2021-05-31 00:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9eaa4682fbd327ef7e948bfe143f5820 SHA-1: 2261835fbc114cc3ed57a9a001b55d1a20f42c9b SHA-256: 7f204654d23cd29f0670b9184614f8578b97d5524d01f4275c2ac5125e6500d3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a link farm designed to redirect users to potentially malicious websites. The presence of numerous external links, many hosted on disposable domains, and the 'Payment redirection / bank-detail change lure' heuristic strongly suggest an attempt to phish for financial information or distribute further malware. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a malicious intent to exploit user interaction through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://soxebez.ru/123?utm_term=bluetooth+keyboard+for+apple+tv PDF link annotation
    • https://patajarixeli.weebly.com/uploads/1/3/1/0/131070073/1142297.pdfIn PDF document text
    • https://kanapikimafu.weebly.com/uploads/1/3/3/9/133997195/bivakubojaripiti.pdfIn PDF document text
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/816dc1.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/gikox.pdfIn PDF document text
    • https://lozexisivebuzon.weebly.com/uploads/1/3/4/7/134702594/xatape_bemag.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/dirinonof.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/miniwubipozuju.pdfIn PDF document text
    • https://selikiwomutarew.weebly.com/uploads/1/3/5/3/135329437/f696c6ef9a4.pdfIn PDF document text
    • https://vawosogujatu.weebly.com/uploads/1/3/5/2/135293246/10f4d8469f.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/23a3e9e7.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/juwog.pdfIn PDF document text
    • https://fafodedok.weebly.com/uploads/1/3/4/6/134602811/kafumuzo.pdfIn PDF document text
    • https://mubaxuru.weebly.com/uploads/1/3/4/6/134693734/keriwidobuxezege.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/2987197.pdfIn PDF document text
    • https://gojefizabefav.weebly.com/uploads/1/3/4/8/134890321/zadipajule_kunomagebig_tojopo.pdfIn PDF document text
    • https://nonewufuro.weebly.com/uploads/1/3/4/3/134334506/1df62.pdfIn PDF document text
    • https://vetexugosopaviz.weebly.com/uploads/1/3/0/7/130738505/gugasuvaniw.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/6138979c-0d9c-41b6-a61e-1dc52d6b4f48/pharmacology_books_for_pharmacy_students_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c43ce4-308d-4f9b-b5ce-61c125571d22/techniques_for_active_listening_include_all_of_the_following_except.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e1a38d-bbec-47e2-aaae-bd344c349ad9/sitinubol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ddea26e-bb66-4ccc-afc2-c6c4c4cdfc31/87458936607.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_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 5096 bytes
SHA-256: 459d8dfb63e9a40361e4d201a6e8cb01ea49dcbed1aee37c4f2dfa2a58ca1c29
font_01_sfnt_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 11092 bytes
SHA-256: 45ffa25818130735b53077c119d03eb59a91db5c4b295dbca32229eda45f1906
font_02_sfnt_off00012604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2