Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e7709e64f68a2b…

MALICIOUS

PDF

130.1 KB Created: 2021-03-23 09:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7e69ac3c51ac625d9feb4a37f7c6bf43 SHA-1: f7c8a939233b75e8521e167db49c2784958cf956 SHA-256: b0e7709e64f68a2b78bbe8e5246513807ff75b51af2363dfa623dfbb89b0bd8b
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://maypoin.ru/strik?utm_term=como+es+la+educacion+superior+en+mexico PDF link annotation
    • https://forilulan.weebly.com/uploads/1/3/1/4/131408022/nebofibeb-nefarab-wukisuzuwozeba-mubazasogudi.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/XEjbaef/rally_championship_xtreme_full_download.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/tagizozituxopararu.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/852MGib/jugujimore.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/zoom_g5n_effect_list.pdfIn PDF document text
    • https://vadanidubaseb.weebly.com/uploads/1/3/6/0/136089859/relole.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/calculator_program_in_c.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hfQSUcW/survival_craft_2_download_pc_free_full_version.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/2461936972.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/gihbtjd/baby_emoji_pictionary_answer_key.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/63698642192.pdfIn PDF document text
    • http://nafewid.sportsontheweb.net/exerccios_de_anlise_combinatria_com_resoluo.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/xekukijefux.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/beneke.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/vHgjqJA/in_god_we_trust_latin_tattoo.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
    • http://zuxokoberibaw.atwebpages.com/hernia_diafragmatica_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ae2466-a378-40b5-b05a-01a6556eeb3b/81865852092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba841a4-aef8-4802-b536-17ebf0eb7e25/vizio_vz043_universal_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/landforms_worksheet_first_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a939d9-c7a9-4474-9f4f-20cc75ad7aa4/what_are_the_bodys_primary_and_secondary_defenses_against_infections.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/moodle_learning_management_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3198e39f-50c3-4ffe-9de6-7e0f3a67434d/compare_the_top-down_vs_bottom-up_network_design_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2c5464-de4d-4801-9d41-95d4b5e28a0e/54300764947.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_off0001b3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3E6 5112 bytes
SHA-256: e970f797f0aac27bfd90593d248d41233cc03bd8454257b668f87f9178ea6870
font_01_sfnt_off0001c523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C523 11332 bytes
SHA-256: 0027147e737f7bef4fe0482ffdb74e55e4dbb648e018ce4bbebf0f332f50cbce
font_02_sfnt_off0001ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA0A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3