Malicious PDF — malware analysis report

Static analysis result for SHA-256 49eadbe2fb87e3c3…

MALICIOUS

PDF

72.6 KB Created: 2021-03-02 23:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a5676609a827bb65777a1535d7478ed SHA-1: 8cb8933915a86eb546a32ef5df4db225d915dd62 SHA-256: 49eadbe2fb87e3c3b2a12b5a3dbff6b5db5612368fbd7dd628bc9f869261402e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution campaign. The presence of a link farm and disposable hosting indicates a low-effort, high-volume distribution method. ClamAV and ML heuristics confirm the malicious nature of the document, likely serving as a lure for users searching for specific software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=yousician+premium+apk+4.13 PDF link annotation
    • https://cdn.sqhk.co/rurewemanavi/ASZUpjc/fusisadozexovupunexafuvaz.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/468130.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/j2cYij1/didi_friends_cake.pdfIn PDF document text
    • http://xivusolokedujes.22web.org/9567960894.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/he5qjfz/92592118226.pdfIn PDF document text
    • https://savaxibinis.weebly.com/uploads/1/3/3/9/133997587/0eef4ca.pdfIn PDF document text
    • https://liketoxisok.weebly.com/uploads/1/3/0/7/130739237/811677.pdfIn PDF document text
    • http://zezomaxijuduj.22web.org/que_es_la_adolescencia_segun_autores.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/javL8ia/at_t_u_verse_live_tv_app_free.pdfIn PDF document text
    • http://genijiloxaxu.iblogger.org/business_strategy_books_free.pdfIn PDF document text
    • http://zuvakaxosamota.22web.org/steering_group_meeting_template.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/gjxBgdZ/40895392047.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/ihidIgg/srijan_physics_class_9_solutions_icse.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/LOgjjb7/perfect_ping-_pong_trick_shots_five.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/N4hgijC/toguludonije.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/jujadodedaruxix/informe_previo_amparo_indirecto_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/tagimatinofugitusun.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_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 5408 bytes
SHA-256: 3bf9245e94e44e3cfdd348a967620b8b97f57b4fe5e4b4852edea8b5aaf1fcb9
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10484 bytes
SHA-256: 3e33015bff935cd5799f1cd0b9a62ef6c8fa91e3718c4baeb94dd0e621186c6f

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