Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d5092268b541c0…

MALICIOUS

PDF

73.8 KB Created: 2021-03-26 08:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 36bf6956e4a5f6bbc2b85d635758199e SHA-1: 3de851c789e7a2f43d2657296a2337a3442faac3 SHA-256: 02d5092268b541c0354264eeec6eed9fd9dce9f462ff4f0e4bfa2d3877c92561
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple external URIs are embedded, pointing to various domains, suggesting an attempt to redirect users to potentially malicious content or phishing sites. The PDF structure and embedded links are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=bambusa+balcooa+pdf PDF link annotation
    • http://xapidomin.mywebcommunity.org/physiology_in_nutshell_ak_jain.pdfIn PDF document text
    • http://dikafitexexodix.iblogger.org/how_to_start_a_business_in_electrical_engineering_field.pdfIn PDF document text
    • https://bijepete.weebly.com/uploads/1/3/4/3/134378827/293775.pdfIn PDF document text
    • http://poxijirubulemax.22web.org/callista_roy_theory.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/variations_on_the_carnival_of_venice_trombone.pdfIn PDF document text
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/vusabafukegam_pixidomu_tixekar_bipuvolifuto.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/7950108.pdfIn PDF document text
    • https://wevopuvigamez.weebly.com/uploads/1/3/4/3/134320632/90ceb9.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/what_is_carnal_knowledge_in_the_bible.pdfIn PDF document text
    • https://tetokanituxur.weebly.com/uploads/1/3/4/5/134523616/kerumuki.pdfIn PDF document text
    • http://pokanupat.iblogger.org/28502325324.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/natopalewen.pdfIn PDF document text
    • http://mojikinewosak.22web.org/hobart_handler_190_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/react_native_mobile_app_tutorial_for_beginners.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/fogezosaravuledu.pdfIn PDF document text
    • http://xetatiwu.rf.gd/subtraction_fraction_word_problems_with_answers.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/69409189553.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/pasos_para_formular_un_algoritmo.pdfIn PDF document text
    • http://feneluveje.epizy.com/bearded_dragon_diet_chart.pdfIn PDF document text
    • http://zipokuxabatu.rf.gd/jevuranimome.pdfIn PDF document text
    • http://fanesavemek.epizy.com/absolute_advantage_vs_comparative_advantage.pdfIn PDF document text
    • http://nazopagoja.epizy.com/gajuf.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_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 5392 bytes
SHA-256: 48dc2032654b083aeb2b14e6860007f3fb3353cbcfb94f4dc03473063fb23dde
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 10388 bytes
SHA-256: a88bb37e972096ecbdf102afe119297f4ebfd8c9842acc2f69dba163f4e598ce

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