Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde10d47d4c976c0…

MALICIOUS

PDF

75.0 KB Created: 2021-05-07 06:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 17c05892f0159144cc1cf65fa766904e SHA-1: 273728babe0cc1d65711592752d4a5e54740a56e SHA-256: bde10d47d4c976c0bfeddc92e61a5b062d542d57ba4c3156553adc3aadd0f9bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign content, but one critical link to 'mezovuduw.ru' is flagged as suspicious and likely malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's structure suggests it's designed to appear as a review to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=kayla+itsines+bbg+zero+equipment+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379846/normal_60173b632abfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5fce2828eaad5.pdfIn PDF document text
    • http://tepedafezubilov.iblogger.org/54015496384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5ffbb05b3bbd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_6066a04e14238.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/xapijifas/dark_souls_cheat_sheet_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/when_to_read_surah_al_mulk.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/4_times_tables_worksheets_ks1.pdfIn PDF document text
    • http://rovujanoro.epizy.com/brahmanda_puranam_in_telugu.pdfIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_b8856735a4cb499887f438d442e8a907.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/fonux.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_2672495e9aeb4f69a3a345b092dace13.pdf?index=trueIn PDF document text
    • http://zoferuwarutor.epizy.com/17870342468.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/advanced_seismic_interpretation.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_6540fb3298bc4184a8a2490c220bdff5.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_05665670fb3a4ba4bfcce7509a453d3d.pdf?index=trueIn PDF document text
    • http://baduwujik.rf.gd/97749583722.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/polaris_360_one_wheel_not_turning.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_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 5676 bytes
SHA-256: 5237be5b0444f7756832898c888d1c52de78c30999ce500c97d03cae0fc41c39
font_01_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 10940 bytes
SHA-256: d6bc95e2f1a1f803808ca97da2e8e9198da44557d67d0767bfde42f21c6523eb

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