Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c00295122aa233a…

MALICIOUS

PDF

121.2 KB Created: 2021-03-16 04:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 09fcae7127ec4129ab1a2c2d7f6defec SHA-1: 26582badf4cac8eb7ccb02bd33859fcfa78aa401 SHA-256: 7c00295122aa233affc81c8a451063ce4600e69e12ac1e4f2d08d87da80158c3
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. ClamAV detected it as Pdf.Phishing.Trojan, and ML classification yielded a high probability of maliciousness. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=why+is+communication+important+in+sports PDF link annotation
    • https://cdn.sqhk.co/nivurerazusa/eggyljc/cosmic_balance_meaning_in_tamil.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/buxizovure.pdfIn PDF document text
    • https://cdn.sqhk.co/zosikoto/jAnFGN5/bedoponatasi.pdfIn PDF document text
    • http://grinallex.shop/nora_rubber_flooring_installation_guidewulu4.pdfIn PDF document text
    • http://argo-tourism.com/black_and_decker_edger_instruction_manuale8jm3.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/ggUhcgj/nipavilog.pdfIn PDF document text
    • https://sajogosekatoja.weebly.com/uploads/1/3/4/6/134682383/rogibatabazogiv_mopitorojagaf_wadunebazonezex.pdfIn PDF document text
    • http://omoikiri.info/how_many_calories_in_chick_fil_a_southwestern_saladw5zj9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fd76c408be0e.pdfIn PDF document text
    • https://kabigupux.weebly.com/uploads/1/3/4/4/134442156/3258281.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/9232264.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/SgfJha4/badum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_f2191765cde24d2297df00489fd3b7d4.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_4e6ff661813f48baa096085af298e9f9.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_747206c9904a4171bdb2b8c5231476d8.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_69bf1df937c2492692e421b0882e12a5.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_30d916e3a723468197f35cdd75ac17fa.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_b07b5d59a3294c43b889cbe5aed81fd7.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_3d7f859b37e2449eb0d705bb7a5caae2.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_ef9d23be0df84e0796f2d3eee33e999e.pdf?index=trueIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_790bf2a504564e2cb745a5dd934d821b.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_60722755152d4f9cb70375602c8ed6ae.pdf?index=trueIn 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_off00019ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DDF 5256 bytes
SHA-256: fe2962df230953b7e9224edb21e51eb1ff6d4399c8275aa8d499db321c0f4478
font_01_sfnt_off0001afaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFAA 11464 bytes
SHA-256: cc91125cabcdb5150e518d64cf974facf95c173678aa97d1fa6759496d81cdfd