Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0cd49365172fde…

MALICIOUS

PDF

67.2 KB Created: 2020-12-19 21:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9bec63b194f0383b232f46c708ab71aa SHA-1: af3fbc228415b1d1868c24eeb732091c7503e975 SHA-256: 2b0cd49365172fde8c3286b015afe56294c267cb0c3ee5f8b6435673f78a764b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDF files, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or further malware delivery.

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://traffset.ru/strik?utm_term=height+weight+chart PDF link annotation
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/5c8a23f57.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/gatevowubugirafodowu.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/068f87ba82bdb9f.pdfIn PDF document text
    • https://nurigefisigutip.weebly.com/uploads/1/3/4/6/134628418/bepogipel_penem_sigabarudamo.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/023c87a2d1.pdfIn PDF document text
    • https://nusekaturorofu.weebly.com/uploads/1/3/4/0/134095869/6219801.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1147f35a-221e-4cdd-9181-154d4a282b80/6722177373.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/zalop.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/microsoft_excel_2016_gantt_chart_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7c7d84-1165-44b8-ae24-57cc9b4e5ea3/how_to_use_game_guardian_on_bluestacks.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/snapchat_hacker_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/epistaxis_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/harry_potter_aunt_and_uncle.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_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 4904 bytes
SHA-256: fcea7c580b9b28e720a1b906978d884d9de09eea26707aa8aa05a84d4325a43b
font_01_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 9696 bytes
SHA-256: 5c38c8e6b26dea6ab455bc4829869989abe5cab99a932f3703557b623b7cbec0

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