Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbf3008676eae68…

MALICIOUS

PDF

74.7 KB Created: 2021-02-22 17:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c82690a49230f7d7b244ca05f160992f SHA-1: f09e9a72e9ee1fc92a6d6e5e615cb10d2a7f74eb SHA-256: 4fbf3008676eae684fd0ac53e325fe5ef4df7ff8f6e93f325f11171d9fac0b7b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this file as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a likely attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=internal+audit+manager+salary+dublin PDF link annotation
    • https://cdn.sqhk.co/zuxosutuku/Jiil1jj/7027670803.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/ijdjehf/saprize_the_crane_game_legit.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/Iu3gjgg/slingshot_price_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/JggggeJ/super_lady_quiz_puzzle_guess_the_character_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/0icIJSi/last_minute_hotel_deals_las_vegas_strip.pdfIn PDF document text
    • https://cdn.sqhk.co/jijubexovoz/bu0JvWB/pomesesefaf.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jHUyjdk/colouring_pages_for_kids_australian_animals.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/jSULQo2/74230374189.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/volorumiw-kanoz.pdfIn PDF document text
    • http://reabook.online/54031783372ajy7a.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/Z2Ogehe/fifelinekadirulafugat.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/jdWihjb/1039565328.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/lYtigjj/guess_the_tv_series_trivia_answers.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/tozaduliwubega/gabisusuga.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/joomla_3_templates_responsive_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/lake_ontario_weather_report.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_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 5324 bytes
SHA-256: 6508c592792384831b9a46c2c779db4e8055ec298945d5edace5589c2aabeb9d
font_01_sfnt_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 10108 bytes
SHA-256: e5be906e64d559ccc552accc8081a8af9ee8d58ec3f21f6e2d31421ffe3af6dc

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