Malicious PDF — malware analysis report

Static analysis result for SHA-256 77eed976ac9c12cc…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 04:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a35400426b2ab9bcbb5eac3ba334df3d SHA-1: 909eaf8f4eb5d1a7012dd1479d6e4df4187fa4fd SHA-256: 77eed976ac9c12ccea93f00f5f2ee4271f149bf69ac03a7bc502b118f816be9e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating a link farm containing numerous external URLs. One of the primary URLs, 'https://fokemale.ru/strik?utm_term=ge+washer+timer+175d5749p005', is flagged as unknown reputation, suggesting a potential phishing or malware distribution attempt. The presence of embedded PDF link farm techniques points towards an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=ge+washer+timer+175d5749p005 PDF link annotation
    • http://kepukarob.sportsontheweb.net/nerezalurikum.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/3039976.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/0a006fb05eb0.pdfIn PDF document text
    • https://faberumul.weebly.com/uploads/1/3/0/7/130739640/6113367.pdfIn PDF document text
    • https://xaredoluvowa.weebly.com/uploads/1/3/1/8/131871785/guxopixeloweni-fanuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_1f070a7ddfda448f8b197e894ecfbc6c.pdf?index=trueIn PDF document text
    • http://wowawese.rf.gd/full_page_yearbook_ad_template.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/whatsapp_status_very_sad_songs.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/becoming_cht_michelle.pdfIn PDF document text
    • http://xitevesapa.epizy.com/print_webpage_to_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/13811201723.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_664ce5fbcaa64eb0b1b46c155c6d3276.pdf?index=trueIn PDF document text
    • http://gamuxazibosiko.rf.gd/barredora_aspiradora_manual_venta_chile.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/aloha_quick_service_manager_guide.pdfIn PDF document text
    • http://givugiv.epizy.com/purevaxanazomalozeguku.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_2a94c6dbcdbd4ba38dfa43c83da0fb7b.pdf?index=trueIn PDF document text
    • http://liraperuwuw.atwebpages.com/asm_metal_handbook_volume_9.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_2ad3af2086ea48ee9cd87e3f59c072e8.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_62e547cd99cd45c69a2bf3a6decb25b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozetej/kabudiredejotawi.pdfIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_06be9b5a28304a809dcc486cbb401a15.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_88b5dc4516944d989d2992a3f20c76dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/wututikajuviwemeban.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_off0000dbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 5932 bytes
SHA-256: dcb66eeca219dead06b261688d308da83a0f63a26364c4256faec632fdd5b0ca
font_01_sfnt_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 11048 bytes
SHA-256: 7915ccc0276a99ff83bc919dfb72b5b70d88384b46566790e5c6c1bd99970736

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