Malicious PDF — malware analysis report

Static analysis result for SHA-256 9317b11c589a93d3…

MALICIOUS

PDF

82.3 KB Created: 2021-03-11 12:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b092501cf510a13b934159c829b55ced SHA-1: 24d8063a5128b617811d79252d6a37513e05389d SHA-256: 9317b11c589a93d396e082d5b0847e48cf613450a75e7dfa5df2192ff3d2e681
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/aws?utm_term=swann+smart+security+system+2k+series+1080p+price PDF link annotation
    • http://everydays.space/70463090604qm414.pdfIn PDF document text
    • http://apkweb.net/who_is_thomas_twin_in_the_bibleu4kwc.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/ntjdbKL/62823896102.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/Sm6TrOk/western_digital_my_cloud_home_login.pdfIn PDF document text
    • http://ventager.online/91026408405kwwdq.pdfIn PDF document text
    • http://just-gopro.com/amc_10a_201958jt4.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/aZjfwhd/28298944059.pdfIn PDF document text
    • http://harmony-market.ru/anthem_for_doomed_youth_poetry_analysiscll2v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5fcc5312eabb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_601285574338f.pdfIn PDF document text
    • http://ipatovaalena.ru/babilomudedu7oc0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479707/normal_6009c6fcdcda7.pdfIn PDF document text
    • http://hookup154.site/76642293435o4vz1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekibavekuje.epizy.com/online_video_er_web_browser.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_796bc2dfbec74b7489cb00bf14fae57f.pdf?index=trueIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_86fdda1f1b284056b360e91628b8b1d5.pdf?index=trueIn PDF document text
    • http://kizuwopo.epizy.com/dotut.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_fc844458bef84cd3b95819299f8eba70.pdf?index=trueIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_d62f936e81ee4e0fb84b2a398a7a65e8.pdf?index=trueIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_b0d163a62b554c06899968da7dcbdf68.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_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 5928 bytes
SHA-256: b22f40b30c9669469ec4e1c4bc54f0222937b078c0db925f12ef7ee46661377b
font_01_sfnt_off00011672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 10864 bytes
SHA-256: bc544e55a58d9a381257843e6b462090c35925d91e061ee6cdd54ad9f5d9dbe8

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