Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ac256f9bfd9e86…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 19:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 268ce454819ef6bb1c47cd2f966cd004 SHA-1: 46d3fd53a6b75f207143f714ba56930cd1691519 SHA-256: 99ac256f9bfd9e8668ff6ac436b711295d2414a9301bbf2eae1fc3b43c2ce2f0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'movie video songs', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=attu+movie+video+songs+720p+free PDF link annotation
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/rumare-zexadazavef-potapagus-nelisetuja.pdfIn PDF document text
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/005c3d5e9.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/advance_wars_units_guide.pdfIn PDF document text
    • http://zufemefuzubaje.iblogger.org/alcoholicos_anonimos_libro_azul.pdfIn PDF document text
    • http://fafaviga.iblogger.org/21301294289.pdfIn PDF document text
    • http://sekegixederixit.iblogger.org/como_configurar_o_roteador_d-link_dir-825_como_repetidor.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/78991975951.pdfIn PDF document text
    • http://sasavojaraw.iblogger.org/alentejo_blue.pdfIn PDF document text
    • https://boliwarabinobe.weebly.com/uploads/1/3/1/4/131437394/3d320259.pdfIn PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/337580.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/cutting_edge_advanced_answer_key.pdfIn PDF document text
    • https://tisuzibe.weebly.com/uploads/1/3/1/3/131379312/5a1a85.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/tascam_dp_24_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wofavum.myartsonline.com/33986542132.pdfIn PDF document text
    • http://noxumalog.onlinewebshop.net/sixet.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/44281973469.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/17632409166.pdfIn PDF document text
    • http://fanodawenu.rf.gd/86310043015.pdfIn PDF document text
    • http://mubadel.epizy.com/rumble_fish_full_movie_online_free.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/less_than_zero_movie_online_free.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/27095330382.pdfIn PDF document text
    • http://wumuduwowuwi.rf.gd/aap_guidelines_for_common_cold.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/dryer_sheets_camper_mice.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/bodmas_questions_for_grade_6.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_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 5520 bytes
SHA-256: 4725ee6d2889bcbe2cca5c35f22f4eeaceedb3f4efe02fe9f013121166b976d1
font_01_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 10532 bytes
SHA-256: a33c9ceea876ed85d80d3edd4843bda4f73d9c346060709ea3c0bf6aa420f85c

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