Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b826af47c5f738…

MALICIOUS

PDF

74.8 KB Created: 2021-05-15 04:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f25e4af2e1b2c5c0a8556b4ae290f3c4 SHA-1: 20351e5d1711bee4ad98b66a6a85052306fbf06f SHA-256: 72b826af47c5f738bc386d22805831004ea121eba438135c472bcac8b889b11e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to a potential phishing URL, suggests the document is designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to distribute or host malicious content.

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://gimoguvi.ru/strik?utm_term=how+to+prepare+for+a+rock+climbing+trip PDF link annotation
    • http://zarewubizeno.mywebcommunity.org/laxigipuniset.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/duwikox-legej.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/8467545490.pdfIn PDF document text
    • https://fapurexetekuwud.weebly.com/uploads/1/3/4/5/134508670/zunobimufabu-debomeramu-jokew.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/8351e12.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/food_safety_and_hygiene_practices.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/nugopelajewosilisivuz.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/lomuper/bivutuk.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/how_to_use_turtle_beach_px3_on_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8938cb0-2f18-4d31-80cf-c591248e3f2b/32948793898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68fb2fc-c109-4b6d-9500-c2bd31a7ba81/twilight_2008_hindi_dubbed_download_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/faratakisejarasezoto.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_6ae30071f4f94fa89dad9e6b2fd38d56.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_173d90476cd346f7818342b915da8653.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/wunegukalepuv.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/technical_analysis_books_for_indian_stock_market.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_777f9f82b0c047e29d43d858cd0583b1.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_f010a41c6ad740869551ccfdf9fce88b.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_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 5412 bytes
SHA-256: a952b9fae67f28326fe37c5d035776c38143ff2eae737091b4b4b62a95a7dbfb
font_01_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 11044 bytes
SHA-256: 02dfab31aaa384aacd181ed0348b8c93f9f79cb64998cd7265aed662c1db92c0

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