Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a0eef408251af9…

MALICIOUS

PDF

125.1 KB Created: 2021-03-19 04:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 493cfc6791a38d71cf3d044cc88f5f9c SHA-1: bcc65c260aa6056712a166ebd5d7f275d095369a SHA-256: 54a0eef408251af9898bdf39ad25517b09fc46544a5ab60d74a671db9a737d0a
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to benign-looking PDF files, but one suspicious URL is present. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search keywords, suggesting a link farm or SEO poisoning tactic to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://midufefew.ru/award?keyword=history+of+ashanti+kingdom+pdf PDF link annotation
    • http://disupiwalu.mypressonline.com/bubadedonogoruwufa.pdfIn PDF document text
    • https://zuwositoxo.weebly.com/uploads/1/3/5/3/135315809/telid.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/fowobeneketoritirisa.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/99350902755.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/wedin.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/youtube_aprender_ingles_rapido_y_facil.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/old_dolls_houses_for_sale_on_ebay.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/barbiere_di_siviglia_paisiello.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/1851763.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/13752811506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_61e4d3b75a244d1f82d691f738365f32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/what_are_the_different_parts_of_a_newspaper_article.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/s_c_r_t_full_form.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_556d063c74a3492aa61773f43800ad8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/winipavedifeja.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_e17b5ea75e984e0aab05df7a4379c4ed.pdf?index=trueIn PDF document text
    • http://gafijid.atwebpages.com/how_to_markup_with_apple_pencil.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_6f63baeda993441d8b4074c4974df63a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/answers_to_all_toefl_essay_questions_free_download.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_c2a53af1a9b141dd9b4a2d8bd93f2968.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/2019_monthly_calendar_template_excel_with_holidays.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_off0001ab2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB2D 5548 bytes
SHA-256: 7fa76a64d9aab86d53bd0344e9759b0495ac187a10061bac9d1880b230c4d118
font_01_sfnt_off0001bdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDEF 12016 bytes
SHA-256: f98741b0f3491ff93b4254142e6fffbe8c4c1884a05107c42ae8c98c432dbd5b

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