Malicious PDF — malware analysis report

Static analysis result for SHA-256 31453fb604d313e7…

MALICIOUS

PDF

70.2 KB Created: 2021-03-28 09:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5f0321ce29f21c850fc4f3a7ce5856cb SHA-1: c8306e011d256a59a4fac7a4e56cd3fbbce4565d SHA-256: 31453fb604d313e7a8b56a5cb3abf75e64ba6b67c3b0f16af3ac748b718b3d0e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with several pointing to disposable hosting and potentially malicious domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to sheet music, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=africa+toto+piano+sheet+music+easy+pdf PDF link annotation
    • http://detonic-romania.website/evaluation_cm2_quadrilatere0d5bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/h5gfiis/company_profile_template_website.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/d2gdwhd/go_fish_sushi_simi_valley_happy_hour.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/laler.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/85521163515.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/OiesgeM/dune_hd_remote_control_programming.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/dojik-rarinenog.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/traktor_kontrol_s4_s5_flight_case.pdfIn PDF document text
    • http://iuts.space/aswb_bachelors_exam_test_prepc1j8h.pdfIn PDF document text
    • http://kino-vezde.ru/when_did_christianity_began_in_europek1puf.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/dmETaro/draw_blood_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/wCvhau8/bil_batori_dialogue.pdfIn PDF document text
    • https://pavenepono.weebly.com/uploads/1/3/1/3/131383439/badilapemo-totanoj-lararupog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_8dcc0aaada014acca009cd821e28777d.pdf?index=trueIn PDF document text
    • http://tamugaza.rf.gd/beta_lactam_antibiotics_mechanism_of_action.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_10a48e0558b74ec581ec3b4ae84df363.pdf?index=trueIn PDF document text
    • http://momibur.rf.gd/what_is_the_constant_r_in_the_ideal_gas_law.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_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 5456 bytes
SHA-256: 4a23b43eca172ac2f5c9472eba44d42038f8af13cb4516dd75e94d0c530e9577
font_01_sfnt_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 10036 bytes
SHA-256: 3a670b27ca9785d39ed4c571ac95d7f138769d9874e06c610148a5099166cee5

Open this report in the interactive analyzer, or submit your own file for analysis.