Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b306b45bc7e48a3…

MALICIOUS

PDF

77.9 KB Created: 2021-05-01 12:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be5bfa3e099e9b3c7ed189eea779b010 SHA-1: 10a50b10c46cc72386e3e1ffc920b0c49c6f1036 SHA-256: 5b306b45bc7e48a3e9ae4d199b341338799f2c63a220b1c2e8f04e4687cec7fa
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, appears to contain text related to cooking, a common lure for phishing documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+cook+spiral+pasta+in+thermomix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416935/normal_5fd8173bdb854.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/bengali_short_drama_script_download.pdfIn PDF document text
    • http://atomyimperial.ru/paduvajumuxud9yny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_60479165ee946.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/ejemplos_de_tesis_de_administracion_de_empresas.pdfIn PDF document text
    • http://worldthailand.fun/71044847318dczkv.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/how_to_manual_roam_on_iphone_82y7c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fc86dc6a0d65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485573/normal_5fc595212eb5d.pdfIn PDF document text
    • http://rodsfish.club/luxamapelada7v22w.pdfIn PDF document text
    • http://ch-redirect.icu/pozelodilobazag5591e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bojonovaja.rf.gd/dependent_and_independent_clauses_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc78054-0aac-4c92-bff4-17986f2c3951/black__decker_silver_12-cup_programmable_thermal_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c276bcb4-8731-4cdb-98c1-863218f184fa/kukurirumurir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e15924-b486-48a9-bb76-e4bfa733a58d/hague_water_softener_customer_service.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/tosasojotokomonalamuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f81a9c-5667-4217-82c7-852a356b950f/cyberpunk_2077_update_pc_1.07.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63859fed-3f40-49f4-a099-c9aa61d382ac/is_the_stock_market_open_on_new_years_eve_and_new_years_day.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/9511884958.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_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 5356 bytes
SHA-256: 837e91bbdd9798657d04abffaa39c30ed1913e2b5f24dd15b86ae612b0bc7c7f
font_01_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 12048 bytes
SHA-256: 5649f2a8199963748877cae184085a79b71a287a172f0f06812090a4280a0ed0

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