Malicious PDF — malware analysis report

Static analysis result for SHA-256 78541e2579078bef…

MALICIOUS

PDF

74.8 KB Created: 2021-03-06 14:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0c755adeacec0fcdf5f478a166159357 SHA-1: 9aa8261979943355f0c3cac342869c534e1f345a SHA-256: 78541e2579078bef23d9316a48a2b673de75a65639b9ea837d28d6aa6c0abab5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying it as a phishing/malicious PDF. The document body, though heavily obfuscated, contains text related to a 'restaurant menu' and is generated by wkhtmltopdf, suggesting a lure. The primary malicious URL identified is fokemale.ru, which is likely used to host a phishing page or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=the+hollow+tree+restaurant+menu PDF link annotation
    • http://xbet1.fun/fixajejebinuwwvs7o.pdfIn PDF document text
    • http://keepsufi.space/wine_enthusiast_silent_dual_zone_10_in._18-bottle_freestanding_wine_coolerz2v8n.pdfIn PDF document text
    • http://my-favshopg.online/hot_chamber_die_casting_process7k0wp.pdfIn PDF document text
    • http://prizinsta24.online/dulufazakamisl8esy.pdfIn PDF document text
    • http://tudorapitame.iblogger.org/bixifodadapotuzejegif.pdfIn PDF document text
    • http://gewebud.22web.org/goropaluwasobi.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/7b714991-6214-4993-82dc-d0ac7d2a6901/asm_handbook_volume_4_heat_treating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fee7283-d5d4-414b-a970-1566469d6bc6/bobekobadubetodepodavezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686a0a89-7884-4cc0-9a98-480f79a96b53/zuzazepike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12caf7c2-4efe-47ed-9d46-6a97f75a8d7c/download_unity_assets_explorer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7d711b-ef93-4dc4-92d9-c71d3f9a2857/59302051875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa6699a-007b-4d5e-9b42-b192f4624a81/haier_12000_btu_portable_air_conditioner_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140463fc-6d5b-4a21-a02e-ed709958d2d9/xodizarim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2583b26-c804-4d25-8766-e0df29b92500/9898150061.pdfIn PDF document text
    • http://fufinekudag.epizy.com/35024845618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5aad2ff-24d3-47de-9410-c971ca7c34c8/bersa_thunder_380_grip_screws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee339ee1-8e83-4513-bb89-756379a6e2c7/fabekolewotepatukomupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371fe4e1-7532-4bc6-89f0-eaadb2d288ce/33840686929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23cd899-4010-47da-b80a-47988683dddd/9940060392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6fedc2-45b5-4ba8-a571-e3453441a016/boxuviwopozalugotutimexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01537b8e-882c-4c3c-86ff-662cd1fe0949/50548430421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a13ed2d-eacd-46df-9acb-fda81e23881c/what_is_the_best_definition_of_social_studies.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 4964 bytes
SHA-256: ea765bbb07314bd19ed6ca1d01486eeeb5471441f1f86e80fd7f68fb124f82c1
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 10764 bytes
SHA-256: 867159c4250bbccbdfa419f80fdfae5e5437701e458c5cb56d2540905a07fcbc