Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3449690368c73b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 09:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fca2f4eb10f290e7cbe045e877afaf6c SHA-1: d73a67869df07c924e55996e8056d97fecfe57a8 SHA-256: 6a3449690368c73b91ebb5c3bb5cdf372575582a02223e6ebc08d83238001c68
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an urgency-based lure. 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 0.9996

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 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.
  • 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://druttle.ru/wix?keyword=free+onlyfans+accounts+2020 PDF link annotation
    • http://gopidap.scienceontheweb.net/ladosorutunotoxela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_600e8793d0cac.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/book_review_or_article_critique_sample.pdfIn PDF document text
    • http://xefofefejal.iblogger.org/tamil_nadu_history_in_tamil_language_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5ff6bfacbd7d2.pdfIn PDF document text
    • http://kuzososo.mygamesonline.org/advantages_of_social_media.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/46346166178.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/tc_electronic_harmony_singer_manual.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/kagakodomajexalader.pdfIn PDF document text
    • http://pisazujinatef.iblogger.org/neluboza.pdfIn PDF document text
    • http://dujegud.getenjoyment.net/brahma_vaivarta_purana_english.pdfIn PDF document text
    • http://folejaf.mypressonline.com/fundamento_prueba_de_catalasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxunexuxulaxed.epizy.com/risugek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51545af8-64ea-4347-8fee-4ca4e20075cd/73594977564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4d8682-a1cb-4a83-9b43-8b866a15e7b9/lanidixajejitatixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61265bd8-b83c-40b2-8c0c-ff4762cb933e/44182667983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1393e3-eb50-4776-82f6-7ab6250af7a5/ridesad.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_c458c671dc524fb98fbbf46f97e2c16f.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_8636bc6b02f24977aaf82f43b313cc20.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14b6882-9fa1-4753-acb4-12f5bb28961b/how_to_reset_a_frigidaire_stackable_washer_and_dryer.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_bacc43ef738a48f3961a6de9b488c289.pdf?index=trueIn PDF document text
    • http://bugigumu.epizy.com/kuturuzedasuval.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_off0000ea3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 5204 bytes
SHA-256: 74c22a91e98a4d1713725d4ac4fd4e18e58bb6159d154faf1bde2c37cd5c17e3
font_01_sfnt_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 10992 bytes
SHA-256: a8cd62e53f9a95d9e6a892f7c5b6a841f185db80d9f2e51f99141a020b27b3b5

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