Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a0f22014c5d034…

MALICIOUS

PDF

87.8 KB Created: 2021-03-03 07:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f2ef1003b87047316ad5f78b011e990b SHA-1: c93fd88820968f8e11c4d221d20a5701edfb9610 SHA-256: 49a0f22014c5d034bf2dff5f277e38c44c53d6c73f4fe98944bc0b0f2820a1a0
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/123?utm_term=marketing+management+15th+edition+by+philip+kotler+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462678/normal_600d9fba12e58.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/how_to_solve_division_problems_step_by_step.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fe237da73142.pdfIn PDF document text
    • http://job-finder.space/xejesuzizab9redu.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/nuWif78/russian_car_driving_simulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/Gjfh1gd/true_fear_forsaken_souls_1_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Jhif7wM/88000383224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fce18698a560.pdfIn PDF document text
    • http://temilops.xyz/kavijegsqn2t.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/craftsman_edger_3.5_hp_price.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/tulewuzodejewo.pdfIn PDF document text
    • http://naturalik.fun/restraining_order_nc_form5p3li.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374369/normal_5fdfc1967d624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/tuboxonenalibulejanalavup.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/49174000225.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/banner_background_app.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/what_is_the_money_cheat_code_for_gta_v.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 5856 bytes
SHA-256: 8a9d26e2c035e6a6dbfb0de55504c90a8537da87d3cc9324bc7043a6fae95865
font_01_sfnt_off000114f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 11452 bytes
SHA-256: 2930143519e6fe639a467af9c51a11111a7b92af1af0f4cf4e6f00a523a97570
font_02_sfnt_off00013c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C45 16100 bytes
SHA-256: 4a3d97cb0f01b67db0f2c0c67b38c82a67e4beafd846d3a18a1ca53b20acedf2

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