Malicious PDF — malware analysis report

Static analysis result for SHA-256 106fe68d0b41c0bb…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 09:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b813a25f134163e8fc74e0363455b8f SHA-1: 83b016ff45e93b253e8f3e1adaad9fb7e35fc2bd SHA-256: 106fe68d0b41c0bb67d416eae36247f8c68e5a4eaea069941a932775de1303e1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The document body, though heavily obfuscated, suggests a lure related to a product manual, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=suunto+vyper+novo+lite
    • http://fuwenosod.iblogger.org/bissell_power_steamer_instructions.pdf
    • https://cdn-cms.f-static.net/uploads/4369909/normal_602d436323da7.pdf
    • http://fivabigenarewo.22web.org/bonoxewu.pdf
    • http://galajanexagaj.iblogger.org/home_exercises_for_back_pain.pdf
    • http://jisurokaz.22web.org/poxuwesotid.pdf
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5fecd3d0012da.pdf
    • http://zimezobot.getenjoyment.net/76148006858.pdf
    • http://vumexovuvelafe.medianewsonline.com/29315750147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/192d5a19-c53e-484e-a97d-4a669ff56c76/gubejerozugedavuzak.pdf
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_273d4fcdbb6440a180379ebef22448ad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/69fd4c31-c958-402f-a271-7f58b2c3887e/how_to_record_a_sales_on_account_in_quickbooks_online.pdf
    • https://uploads.strikinglycdn.com/files/792b560d-44ef-449c-a2d4-aaf6c3a85bb3/what_does_rag_doll_someone_mean.pdf
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_d660de43bdfa477f9936439d883f0df4.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_94fd8acae21f4fb3849b216fea0985e1.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_f1c4815ec54b4da98de233a76bf84cc8.pdf?index=true
    • http://pevogikuxupeja.onlinewebshop.net/94284323292.pdf
    • http://tifilow.onlinewebshop.net/where_to_donate_womens_suits_near_me.pdf
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_ad86c8fd5f57441094c2e2bb73879268.pdf?index=true
    • http://jomewudixaf.epizy.com/17155902827.pdf
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_0e3038240fb84ba184ff136777292a64.pdf?index=true
    • http://jeborawaleko.atwebpages.com/how_to_tell_difference_between_viral_or_bacterial_pneumonia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f648.bin
4444d2d76de61a6b5dc3c6dce0b26f68558afd40451b74a1aa8188491c86c26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 4688 bytes
font_01_sfnt_off0001065b.bin
9ffe556369dee8b071ff2477bdcbead245b4aeb6636310f3971e59121c366a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10760 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.