Malicious PDF — malware analysis report

Static analysis result for SHA-256 c802e2427a15cd21…

MALICIOUS

PDF

72.9 KB Created: 2021-04-04 02:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2f98374611d84bf485dc0aede19522a1 SHA-1: bc0a8e8cc61e197e0c5984cf4131720ce1d70c73 SHA-256: c802e2427a15cd212d640c5e76938025e552adfa0d1174821c1f4481683f6aa3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=guitar+techniques+magazine+back+issues+pdf PDF link annotation
    • https://cdn.sqhk.co/guzikiku/idgjxhf/30658535497.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/jozipego.pdfIn PDF document text
    • http://superheatbelt.xyz/pillars_of_the_earth_streaming_ukkszza.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/41976853115.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ghghhha/latonipedugamogararol.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://sotarebesowula.medianewsonline.com/tuzowariwiremabetujo.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/zijgcFS/lusugen.pdfIn PDF document text
    • http://dotapibipemeza.iblogger.org/april_2020_calendar_template_word.pdfIn PDF document text
    • http://gifagudilul.mypressonline.com/18269753657.pdfIn PDF document text
    • http://7evenrp.ru/994158631430w9es.pdfIn PDF document text
    • http://italia-doc.space/how_to_repair_behringer_mixerssw73.pdfIn PDF document text
    • http://ig-objectionform.com/best_table_topics_contest_questionscz494.pdfIn PDF document text
    • http://edaeda.moscow/how_much_is_a_mercedes_gla_service_costioq7j.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/Mqaigjb/62975356168.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/cjcEqVm/15368679477.pdfIn PDF document text
    • http://xutifufaxe.mypressonline.com/accidental_sampling_technique.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://morufigalolo.rf.gd/62650041152.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_6c898ad55aee4ff699acf0c51bb87ee9.pdf?index=trueIn PDF document text
    • http://kefofasenufumug.epizy.com/arduino_tutorial_francais.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_3a4ffbfebd324ca5b8caa6355c23b211.pdf?index=trueIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_cbed59e2ead44a9ba23ecced34dd577f.pdf?index=trueIn PDF document text
    • https://e321b6f2-2a0a-4c58-8c60-26baf46d82f1.filesusr.com/ugd/14900c_c918f6132a62487bab78f4956cfe2fd0.pdf?index=trueIn 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_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 5948 bytes
SHA-256: 0329599c29f03428b7cb4d57fd42971dedd0bb85d7eab8db823814075f087f91
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 10892 bytes
SHA-256: a1f45d6b127b35728255ea5d1a9d19f3e9207840416936c293948fdb77678340

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