Malicious PDF — malware analysis report

Static analysis result for SHA-256 96de04b7b4b501e7…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 05:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 41c691ea6afb05b8144dabb62a191235 SHA-1: c88fdd31cbdc844a3cd8cb7e7b65cf8fa668dfb3 SHA-256: 96de04b7b4b501e7dc1b16e33517dbd9d1a61b78228da71047d665c663c0ed0a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=php+textarea+html+table PDF link annotation
    • http://tapavinologo.mygamesonline.org/examen_automate_programmable_industriel.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/rapobezoxapunubu.pdfIn PDF document text
    • https://romizipomubem.weebly.com/uploads/1/3/0/7/130775952/931881.pdfIn PDF document text
    • https://vaferomesab.weebly.com/uploads/1/3/4/3/134351928/wododuk_mibizumujo_kubomijeraloxo.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/fedes-wumumim-fesafuk-kubux.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/a7e92d76abe333b.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/cd33576.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/36f929ddd5d8.pdfIn PDF document text
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/b5fea9def890d.pdfIn PDF document text
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/6c324.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/17034747117.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/nidagagix.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/62a32648955.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/class_11_chemistry_textbook_download.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/6634000.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/angular_tutorial_point.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_366725a1f98342b090ab6a69719ec81b.pdf?index=trueIn PDF document text
    • http://fefijenaxub.rf.gd/can_i_change_file_to_word_document.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_017eb1fc9f8a41b5874308a577b5f53f.pdf?index=trueIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_a4257176a791499cae21b67699647959.pdf?index=trueIn PDF document text
    • http://tokofelutuj.epizy.com/koropavemonipoxow.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_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 5092 bytes
SHA-256: 932737f8fa7f84e4b59bc40461d22a916b26c4d67f419d1accfc8d2b1bc0324a
font_01_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 11768 bytes
SHA-256: 2ed3246a51b98aba2159c3d41d300ee821c26a80552d05d5fac055d8f2c210ec

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