Malicious PDF — malware analysis report

Static analysis result for SHA-256 242c60acb7da97f6…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 22:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8bf9a1a3f8e6603074c8fb2c1651e1ff SHA-1: 5094fc10b4ed20904e4ce9e21971402351e0a137 SHA-256: 242c60acb7da97f60cd82176ef91d88e3c1eb2497321109440a507bf582fcad7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=is+death+note+on+netflix+canada PDF link annotation
    • http://hardcreditcheck.info/windows_10_pro_free_download_full_version_20195hkxi.pdfIn PDF document text
    • http://boketizabujig.scienceontheweb.net/lubatofasogozasinofi.pdfIn PDF document text
    • http://instapodarok.site/event_budget_spreadsheet_example106jz.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/2821197484.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/avengers_infinity_war_full_script.pdfIn PDF document text
    • http://5coupon.info/63181926350weij2.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/21872343841.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/how_to_calculate_interest_due_on_a_debt_management_planq7aot.pdfIn PDF document text
    • http://randname.ru/how_would_you_describe_the_climate_of_the_philippines3dxdo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc98851-ee5e-4f87-b331-aa77fed5eda9/89797503872.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_7c65f61c060d4145876f568bfab99e55.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_b9c46a8026ae46519a4e2c5e904fb137.pdf?index=trueIn PDF document text
    • http://nukuzuxowilaz.epizy.com/lixabubuji.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_e1f8384918ae4b1d8550958136bd1830.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba197103-e6ac-48d9-92d7-462a18f809c9/can_massage_help_metatarsalgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696e7797-cafc-4feb-8097-eec087109063/66963350094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f687cb40-0540-462c-961a-7673b93f6e3c/how_to_pair_denon_bluetooth_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fc6896-f194-4d5a-bcfd-1d9af17e3ff1/can_i_use_my_tracfone_as_a_hotspot.pdfIn PDF document text
    • http://ramogefakox.rf.gd/kibajuzesipuzutiwokalatit.pdfIn PDF document text
    • http://mujelagikajuju.rf.gd/vojaxadubolaxolipu.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_7e1c93bbf69c484bad016755be235b67.pdf?index=trueIn 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_off0000eae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 3540 bytes
SHA-256: 0d92e529edce3d40673aa4d3c1a37b6f4ca40d16397055a4fbdf10ada284692a
font_01_sfnt_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 5020 bytes
SHA-256: 96544bcb27d7f4fae24ebb8e3da187042e3fef6735864995db540641db243e47
font_02_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 11092 bytes
SHA-256: 38278322505a24eb1ed680455c100eb215fb4d298449bf4ccbd907ba31b27d10