Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33137c91a19d287…

MALICIOUS

PDF

75.7 KB Created: 2021-03-20 17:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2cad3e60aa62ed22b36658bfaf1d5dd3 SHA-1: 6da3f1ee365b2a80b3a5eb5145dce9d514b7a6d9 SHA-256: f33137c91a19d287fbb9279ec17f43ba2151131e374fe9b3c2be36ca775c61a3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and a potential phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

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://ponafet.ru/wix?keyword=how+to+raise+your+own+salary+chapters PDF link annotation
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/warofupodogopuva.pdfIn PDF document text
    • https://jimozesixumuwis.weebly.com/uploads/1/3/4/5/134508673/topeboniz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5ffb938a13096.pdfIn PDF document text
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/rukozazeveb.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/heuF04S/lenalubakonuzexamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_603b7db2c063d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fd66205bfb76.pdfIn PDF document text
    • https://jafadunew.weebly.com/uploads/1/3/4/6/134632108/labegapilibotitemoj.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/sexazulaxusexu.pdfIn PDF document text
    • http://ruzopiter.iblogger.org/ragema.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/fS4NBsY/barbie_fashion_closet_game_online.pdfIn PDF document text
    • http://timogefubor.22web.org/carmageddon_2_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/eHEhapT/adobe_lightroom_instagram_presets_free.pdfIn PDF document text
    • https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/mupeduvapazeti_dewaliripap_kulevaxomobex_zipadoz.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/borokegujuzero/radio_shack_electronics_learning_lab_28-280.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/request_for_leave_of_absence_template.pdfIn PDF document text
    • http://mafovito.rf.gd/what_ink_does_a_hp_deskjet_2132_use.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/alistair_dragon_age_dialogue_guide.pdfIn PDF document text
    • http://vumafovixono.rf.gd/what_is_the_collaborative_problem_solving_model.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bow_arrow_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/rofalaviror.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_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 5176 bytes
SHA-256: 5ab81bfad6f3acd597647c8fefb4a783a5b24259808a387c9b9697712d791429
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 11312 bytes
SHA-256: ebd35dbfa1dcddb494706524cc8d3560cadc3b5ea59dabafe94e4f1043b3d973

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