Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6870aa73eb3ed26…

MALICIOUS

PDF

77.4 KB Created: 2021-02-12 21:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a89f390a39818d1758c81bf04fc0135b SHA-1: 69cf5ab778fbdccfda704d9c45d7de00884ad576 SHA-256: b6870aa73eb3ed2655f5f9a06ea8a6fd8d92766e17ecbf13cbf9f7d361d336c8
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, suggesting a link farm or SEO spam tactic to drive traffic to potentially malicious sites. The embedded URLs and the overall structure point towards an attempt to deceive users into visiting external content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://druttle.ru/wb?keyword=electronic%20circuits%202%20important%20questions%20with%20answers PDF link annotation
    • http://detonic-hypertonie.website/case_study_whale_evolution_answersh46wt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fca8172b7c99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421611/normal_5fc900619d1e2.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/hdKbjdU/granny_legend_hero_mode_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5fc6a4ad45760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5ff7c7bae2d8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fff425f78be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fd923a7b7266.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/5a21505e7aaf5f1.pdfIn PDF document text
    • http://draiwenstore.online/todabadutivatufekazamobudl9xlj.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/5434370.pdfIn PDF document text
    • http://bezprovodov.guru/netgear_r6900_vs_r70005inyh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447433/normal_5fece585b200b.pdfIn PDF document text
    • http://bet-info.ru/606184700ec16o.pdfIn PDF document text
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/tawefexemitu_joruma_jidogitula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_600e23d07ff9f.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gfgfM2I/risk_analysis_journal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5fe99bafceb2a.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/hiihQUU/tematedidunufaxokumoxafam.pdfIn PDF document text
    • https://zivixitusinuz.weebly.com/uploads/1/3/1/3/131380786/ruzatebuwewe.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/wisuw/tawosozus.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_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 5480 bytes
SHA-256: e7cdb7e3ef4f90f52ee773da11e76840e870263db4dadc7ae42791a271220fce
font_01_sfnt_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 10148 bytes
SHA-256: 51d84e7971477b46ed05d4057cb1d43dca71f3120088acf4eca6309941a21acc

Open this report in the interactive analyzer, or submit your own file for analysis.