Malicious PDF — malware analysis report

Static analysis result for SHA-256 502c7c9f249fb9bd…

MALICIOUS

PDF

147.1 KB Created: 2021-03-23 01:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7f6ba001d4c57df48c13178bbf01d029 SHA-1: c023472ed88cb5b3a20d1b39c51b7e19f5d77513 SHA-256: 502c7c9f249fb9bd521f19e6df719dab39e8437870b09cd47f19e7688c02308e
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 a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating the document's purpose is to host numerous links on low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://zajinet.ru/wix?keyword=english+banana+boxhead PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410702/normal_60421f59acab8.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/tifefibitubudazubur.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/50773684818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5fde656766e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_602335563e8cf.pdfIn PDF document text
    • http://pestore.pro/background_color_android_studiotf9ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428062/normal_5fdfd57813092.pdfIn PDF document text
    • http://topshops.website/parrot_mki9200_remote002pe.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/5e51879a6ffc1e9.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/andhra_jyothi_news_paper.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/mivaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5fe868a4b25ee.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/a58963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_60535a784140e.pdfIn PDF document text
    • https://ripabukufekova.weebly.com/uploads/1/3/0/7/130738984/rukosumaru_luxixadap_temajoko_poderiru.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/sijafuronumotol_wozobudek_jidetipez.pdfIn PDF document text
    • http://idealicaitalia.website/ignou_assignment_submission_slipnqc6z.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/gonemad_music_player_trial_apkmnca4.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/lopadivupudexa/feliwuwidom.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/atlanta_braves_schedule_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/53692975875.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/46390768384.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/ejemplos_de_monografias_con_normas_apa_2019.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_off0002047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2047F 5156 bytes
SHA-256: 4e592ec2fd3517260ef322f2adfe2bd5f8bf99a5e87a7ab0f85404221d58bf72
font_01_sfnt_off0002160d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2160D 11196 bytes
SHA-256: 92cf1952702a5ed2cd28ea68475a57ad598c4898e6ac253994a379294c830100

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