Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74d994d983b6edd…

MALICIOUS

PDF

82.1 KB Created: 2021-04-22 08:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 49a3b5591f55d8a3e8bc53607d266238 SHA-1: 678e1bafb74d4498e5f9a7eae3ea6c035ffbc48e SHA-256: e74d994d983b6edd566244c30c782fd7b6b416ebaea7cbd2b29ad97284846bb4
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 potentially malicious or spam-related domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to product reviews, likely to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=review+dometic+portable+toilet PDF link annotation
    • http://vumamanepu.sportsontheweb.net/balanced_diet_project.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/adding_watermark_to_mac.pdfIn PDF document text
    • http://1-bog.ru/bebebupabeperufedigingorau.pdfIn PDF document text
    • http://tiktokfrance.fun/99384805637giu6s.pdfIn PDF document text
    • http://paganel.world/bengali_horror_moviestb2ua.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/wunder_von_bern_1954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jubiferekaka/48206155303.pdfIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_651ab536b6bf49718865f49c2117adbd.pdf?index=trueIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_7b7d9c50ebe14e8d86e52a8a762908ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davawina/portugues_sem_fronteiras_1_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/limilazax.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/55417731953.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/man_looking_back_meme_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/archaeology_and_anthropology_relationship.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_f2ca021aec0f49028d523a3124cbbb95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/simile_worksheets_1st_grade.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_ee74c4f59a2b423aaf13a33afe76783a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jovekus/14028112373.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/internship_cv_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/gawuwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/azote_formule_de_lewis.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_0ef7235597294397b3fa7f23baf54932.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/63880251652.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/boyle_s_law_practice_problems_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 5020 bytes
SHA-256: 5cdb7ec826f070fc0139fa6aa5379b53a5dccf546c78590d6f64e2f68f004271
font_01_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 10956 bytes
SHA-256: e32d07ce9165c4ebbbf1b9db71e9fea2eb8a23907fd421d8dccdd8542315fa2c
font_02_sfnt_off00012c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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