Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3883e477d6044a…

MALICIOUS

PDF

65.1 KB Created: 2021-02-17 06:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bb6a7486f872d98ad652c34b9754f723 SHA-1: 19c24ea95699a1b502c7f670b2ca4bb029712999 SHA-256: 0e3883e477d6044a462cb6776662f1d4df146bb46ca2ad0cbe49a572fcd686b9
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=2008+jeep+wrangler+sahara+unlimited+owners+manual In PDF document text
    • http://relax35.ru/duzonavotefotumeloz7afyr.pdfIn PDF document text
    • http://sberbank.services/zaseftrnr9.pdfIn PDF document text
    • http://boxberry-24.cc/issues_in_education_school_reform944ag.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/geOdgdf/rockstar_game_zone_brahmapur_odisha.pdfIn PDF document text
    • http://boevoenlp.com/start_time_for_today_s_nascar_racemhpbt.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/zjeapiy/hard_boiled_eggs_in_pressure_cooker_no_basket.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/jjiniY1/zofutixeruwonaxelikal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_601efd29c929e.pdfIn PDF document text
    • http://lepegumokolato.iblogger.org/alpha_helix_and_beta_pleated_sheet_structures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_602365927c2fa.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/djgigIs/free_online_auction_sites_for_nonprofits.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepikadagutuv.epizy.com/timex_1440_sports_manual_set_time.pdfIn PDF document text
    • http://nividibewejoba.rf.gd/8077274576.pdfIn PDF document text
    • http://toraxetutat.epizy.com/63063106853.pdfIn PDF document text
    • http://gazusoketa.epizy.com/mcgraw_hill_7th_grade_science_answer_key.pdfIn PDF document text
    • http://bidasumibave.epizy.com/93059987752.pdfIn PDF document text
    • http://sisubupofi.epizy.com/sheetrock_patching_compound_easy_sand_5.pdfIn PDF document text
    • http://viminug.epizy.com/sobexorixodamoba.pdfIn PDF document text
    • http://vosolapigufax.epizy.com/tuledozevilafagiv.pdfIn PDF document text
    • http://zifawikixeliba.epizy.com/99812847331.pdfIn PDF document text
    • http://wivufaw.epizy.com/filmic_pro_android_discount.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_off0000c17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17A 5912 bytes
SHA-256: 9957f397ae083046dc15018bd6a551a334478de8f0253e3cdc95b6531115e65d
font_01_sfnt_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 9728 bytes
SHA-256: 0c50e0721f5a879f0a12f659b476eb98af00150b70b9664455c662df67715f13

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