Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc46eeab601fed2b…

MALICIOUS

PDF

68.9 KB Created: 2020-12-17 09:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 89934e04c24efba9c6771241111065b1 SHA-1: 3768495f71f3c21aca9ca50b04eec7bb56ff8150 SHA-256: fc46eeab601fed2b63ec98cd8008cf0c49f52c8ca86d072059b3d94f542bec15
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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=natura+farms+keto+pills PDF link annotation
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/542356a6124f0d2.pdfIn PDF document text
    • https://fumifopimon.weebly.com/uploads/1/3/4/4/134464078/7414291.pdfIn PDF document text
    • https://zutetovidum.weebly.com/uploads/1/3/4/4/134463402/6684656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5f941a36da09c.pdfIn PDF document text
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/747318.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/5fcf02602a3d2561f5f9de7f/t/5fd662e8b1c3f31c7a815aac/1607885544511/dimensional_analysis_physics_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeeea2e0-cfa3-48dd-854c-681c14823374/xemufupimobowaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edabaa0b-55e3-4038-8e02-8a031a64ca4c/widegasez.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/vixenebonogawevipade.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/88609193031.pdfIn PDF document text
    • https://s3.amazonaws.com/dafalebinoza/leveling_guide_dofus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef49fad06677b0d28f533/t/5fd09f13ef76c20f2d4d2838/1607507737467/fukemobivalegewata.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c43aa87939686407a428/t/5fc1c672e18c5c478e3d6f9a/1606534771068/95902953423.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7830239503a47f6fdd30c/t/5fd7419d226e9048fad282b6/1607942557582/original_happy_birthday_song_lyrics.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_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 5080 bytes
SHA-256: 91cb09dc26fdfb6e3a2c6b26b6775dafbf20a9efe6a7cfdc84c548a8eb8ed1b1
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 10608 bytes
SHA-256: 8bd1e0c28042cdf9493bcb98d2a51df9153a480d60b351f10b0ac61bf353c171

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