Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ad576ea5ce83b9…

MALICIOUS

PDF

104.2 KB Created: 2021-02-23 09:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 95315f73c20eb59670a7bc28ea1e6e0a SHA-1: 2a182fd034d6eb7882577b67762984aa1a0d561e SHA-256: 95ad576ea5ce83b930cd3a7b68c29166f349644837109742f6460a6c9d61e7ff
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content or exploit vulnerabilities.

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://leonvi.ru/wb?keyword=cost%20to%20get%20car%20air%20conditioner%20fixed PDF link annotation
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/fixif_mejud.pdfIn PDF document text
    • http://wiinorama.fun/96938714843ayewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482018/normal_601e565284277.pdfIn PDF document text
    • https://xokosawebajufad.weebly.com/uploads/1/3/0/7/130776850/ca454d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fe450ca8c9dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_60173fb9a99ed.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/lizir_jaleganoxemifo_nodananu.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/strategic_advertising_management_ebook6lb1j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5ffa209901322.pdfIn PDF document text
    • http://wirelessinfo.ru/buvor1mvrv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_602d333dcc359.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/dudeponavi-wumirek.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/6236456.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/povatiwe-dibamo.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/bapek_wepedu_tolube_finoforu.pdfIn PDF document text
    • https://zowotojezef.weebly.com/uploads/1/3/4/3/134330732/0c19e3500.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/sezebepit/26455055905.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/kinemaster_pro_chroma_key_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_reset_daikin_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/mikexiji.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/50852770869.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_off00015cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CBE 5128 bytes
SHA-256: f4d1f29943f74879905146b20b3bc8a45970c84530d912a9b5d3910ac25d78c8
font_01_sfnt_off00016e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E44 10948 bytes
SHA-256: 8975c6f6e164563d2e2276f2f7c51ae142f73923e2b55ba693093a4035da53b7

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