Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f2795bbf274c5d…

MALICIOUS

PDF

83.6 KB Created: 2021-05-07 01:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d8d72578f56f9d8de64a7365c51c7b5a SHA-1: fc75fc622ad483a9290b89ebe3cd0fb048645a6b SHA-256: 45f2795bbf274c5d095dc967010f43b2e5ed20c6f7b2bb83e9c3fe8a912994c9
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=it+was+only+a+dream+lyrics+celine+dion PDF link annotation
    • http://desenusexewu.iblogger.org/facebook.com_account_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/kF1SjgI/pemuwaxesatibozonobu.pdfIn PDF document text
    • http://uscreditcheck.info/how_long_does_developmental_editing_takevvv7y.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/eigiiME/rofugowibukudukaxinogegi.pdfIn PDF document text
    • http://zezasasipow.iblogger.org/solubility_curve_worksheet_2.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/hiQkVD2/tovanarubonop.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/Zgihegc/14709507628.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/solucionario_algebra_lineal_kolman_8_edicionajj96.pdfIn PDF document text
    • http://shtangye.xyz/vosiloreseruwokupuw1xf.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/LhbvkQp/linkedin_application_developer.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/fZhdRvZ/best_talents_for_heroes_castle_clash_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/ghhPqfU/dreamed_i_was_pregnant_and_bleeding.pdfIn PDF document text
    • http://vovodofozufora.iblogger.org/machiavelli_discourses_on_livy_quotes.pdfIn PDF document text
    • http://tells.fun/educational_leadership_journal_submission_guidelinesb4zq8.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/jepinebawo/pivewakidubine.pdfIn PDF document text
    • http://pilomewolax.epizy.com/baxuvevilatanis.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/give_the_rules_for_writing_scientific_names.pdfIn PDF document text
    • http://wogijotiko.epizy.com/free_lsat_logic_games.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/how_to_solve_a_3x3_rubiks_cube_in_no_time_the_easiest_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/21262700771.pdfIn PDF document text
    • http://zerimokima.rf.gd/block_star_planet_apk_indir.pdfIn PDF document text
    • http://tinipukax.epizy.com/48057842277.pdfIn PDF document text
    • http://fegugeg.rf.gd/dupefoxelisadimix.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_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 6696 bytes
SHA-256: d25c71bc88d9db74b3566b1266725bfc57b6f4c0b907571d2949b026cbaea04d
font_01_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 5216 bytes
SHA-256: bda619d14b943dd0c31a1f297b73545a01b8999e733d5a2a0eb6c06934d14f6e
font_02_sfnt_off00011b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B63 11864 bytes
SHA-256: a2a91d53d04ca10677302fc21bafdde76bc45caadaa9ab24e05cb6900f3f77e6

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