Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ea4f3c8dec5e97…

MALICIOUS

PDF

65.0 KB Created: 2020-12-21 23:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4c604d7c9cecb9fba886348bd59d8fe8 SHA-1: 4caf7f1aa67903048fd1914194480b08da5aafa9 SHA-256: 45ea4f3c8dec5e97b6f37c8a2028321743c82dd473c451109da61cf32052f574
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

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://trafffe.ru/strik?utm_term=btd5+hacked+tyrone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5fb2b31439a2e.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/acfebe5e1dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f91649719b76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f9158e0c8a2e.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/dilufoxilesuta_gobasefitudufod_wagevujoti_buvaferifevudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_5f99eaa4944b4.pdfIn PDF document text
    • https://vipelunova.weebly.com/uploads/1/3/2/7/132712034/6221787.pdfIn PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/lisusivari.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/lugojijelarisot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdf31171091525336552bb3/t/5fdf9f4b42c0045a331480ab/1608490828493/64384482637.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/javascript_submit_form_ajax_without_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/wixixuloduwis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a765405d5340f32ee4e2/t/5fc6c01c0791337046cd7787/1606860828438/32261372276.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58d04cd1e280355f3c276/t/5fd0e714ee691218684f6530/1607526171813/dachshund_wiener_dog_puppy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd18111f6a419847f67ca/t/5fc21a93f81c9a2a0ce9cbf8/1606556307880/tekagatovavirokilaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc0f90e64571256545e4b16/1606482201845/baking_math_worksheet.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_off0000c3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E1 5156 bytes
SHA-256: 168bba3b30fd7e66d3622c9b080e3c76a0b7477b93fa1279e4cd3c1af4b51ecd
font_01_sfnt_off0000d576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 9828 bytes
SHA-256: e7ba7cfc8d40f94c76dc0c47c1e36d8a8140f360ccd6de118c8c2b8987515aea

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