Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a49d8385cbe22d9…

MALICIOUS

PDF

76.9 KB Created: 2021-01-24 00:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8551efda224c5dbd47019ed64e245f2d SHA-1: 74ef3aa0e54fea07fec1e7ad5196130b9300d45d SHA-256: 6a49d8385cbe22d97180c0b0dbcca083d89c9763000557bc405dad535c544510
176 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for phishing or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://trafffi.ru/123?utm_term=too+much+of+a+good+thing+kimberla+lawson+roby+pdf PDF link annotation
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/wofosil.pdfIn PDF document text
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/6947081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448110/normal_60060e8b84cf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5fcae75482cec.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/1aee5a5ace512.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/jeviripazerulel.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/lumenirojumironux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5ff2b0b9bf5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412403/normal_5fdf4d899e9e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383147/normal_5ff8a4fce456f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fd32d81eb917.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/fgjgjgj/94515557244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jitimesolagun/arcgis_10._6_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/weekly_tasks_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/lejunuxijezuvedu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5800 bytes
SHA-256: 0a8597de3ef0b640ab238c071dacf1849feee6af2bbef144eb31617ed50a2fa1
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 10692 bytes
SHA-256: 7ffaaa106173eb5eac14bdbecc42fff28fdb52a6e50634e4c5bb945a2939a6c1
font_02_sfnt_off00011809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11809 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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