Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d64f6f324ff7ae…

MALICIOUS

PDF

64.0 KB Created: 2021-03-24 17:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f438ac7d4d1fca3604cc8a0e2eaa2155 SHA-1: 9bb7c03050b07b8eb0ade53f89a95fc1fc37f117 SHA-256: 48d64f6f324ff7aec3b6736a962ead4b94633bd761e50cf8ebe8d8426d2f5e26
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics as a link farm, containing a large number of external links to other PDF files. The ML classifier and ClamAV also identified it as malicious. The primary purpose appears to be directing users to external resources, potentially for SEO manipulation or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8535

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 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
  • 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://botokaw.ru/123?utm_term=chatal+band+dj++free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6034d63d752bf.pdfIn PDF document text
    • http://katalog-siberian-force.online/4358457935141h44.pdfIn PDF document text
    • http://brumbum6.xyz/feng_shui_2_rpg_archetypesx6x4l.pdfIn PDF document text
    • http://nijagegedok.22web.org/nespresso_lattissima_one_manual_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fdc41ca493bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_60465b90dd0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_603843b417bdc.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/6906472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_603962ed2b148.pdfIn PDF document text
    • http://qwonder.space/lanonumititarovusedajgoazc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416502/normal_602a125d5f0b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fc9e38a48ec0.pdfIn PDF document text
    • http://spoonnumberone.xyz/congruence_of_triangles_class_7_worksheets_cbse4nafk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_60164bcae3c9e.pdfIn PDF document text
    • http://vavenuvukubanav.22web.org/40598813697.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/nisuzop_mawapu.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/zadediz.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/tanapilamaxi/music_video_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/turugerepotixiposo.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/kumutajesuzisebififurob.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/606421473.pdfIn PDF document text
    • http://poxalurerozelak.epizy.com/how_to_open_hp_probook_6550b.pdfIn PDF document text
    • http://gozudivigel.epizy.com/definicion_de_enseanza_aprendizaje_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/97873714084.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 4936 bytes
SHA-256: 35c752bf19d02b61d4cd21b633babc58e74a315342debc8926a78e2cf22f75f1

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