Malicious PDF — malware analysis report

Static analysis result for SHA-256 9780eb31f7c7e17a…

MALICIOUS

PDF

69.1 KB Created: 2021-02-23 23:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e634733422818442efc18ddb8a680db2 SHA-1: 708ed9591c0910812b2062023f4d9fa9cc23e388 SHA-256: 9780eb31f7c7e17a9603aa2f61b7f0c901ac137d6f98b156f0ce48cdf9f3a01c
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=they+say%252Fi+say+templates+pdf PDF link annotation
    • https://zameleto.weebly.com/uploads/1/3/4/0/134042643/pemifijiterafor.pdfIn PDF document text
    • http://zomoxesami.22web.org/commercial_settlement_agreement_template_uk.pdfIn PDF document text
    • http://xenipufuk.22web.org/domain_and_range_word_problems_worksheet.pdfIn PDF document text
    • http://prognoz-football.club/anamnese_terapia_holisticaeubui.pdfIn PDF document text
    • http://xagigusutop.iblogger.org/can_i_get_chrome_extensions_on_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_5fe40a5df1cf3.pdfIn PDF document text
    • https://zulanamojo.weebly.com/uploads/1/3/1/0/131071117/bidujeverixugomifag.pdfIn PDF document text
    • http://complect-tech.ru/gemunixuvotezogorutzuftr.pdfIn PDF document text
    • http://jisorozasakima.iblogger.org/best_ppt_background_free.pdfIn PDF document text
    • http://quickstore.pro/sazisopabujetikejejafil6584k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulikoviluxugu.rf.gd/28718684117.pdfIn PDF document text
    • http://gisesufuxezemud.epizy.com/56329984912.pdfIn PDF document text
    • http://vutaxinasiva.epizy.com/europe_trip_planner_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/rare_genetic_disease_brain_cells.pdfIn PDF document text
    • http://tovujopojat.epizy.com/numbers_in_spanish_1-_100.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_off0000d2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D3 5272 bytes
SHA-256: 4892e72783162ad80d4674382eee86524f3ef91c75fd00cd377c3e953d25430f
font_01_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 10432 bytes
SHA-256: a38d0dc2ecfd45f266d90abd9ddbc85fbb7624482529ef061c39d3fc8f25769a

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