Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1efdf16674629df…

MALICIOUS

PDF

77.2 KB Created: 2021-03-05 22:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 227c53b690217073b04d3145616d7c2d SHA-1: e45448eb0e574530c715a798e9de51b3d134e336 SHA-256: c1efdf16674629df3bbe27af54d73232e30e604d995be9c22d514eb1529cfa36
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/aws?utm_term=big+fish+christian+movie+review PDF link annotation
    • http://wajuxerisowo.iblogger.org/sugar_company_share_market_list.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/kubota_v1505_diesel_engine_for_sale.pdfIn PDF document text
    • http://japadalifu.22web.org/arabic_alphabet_with_words_and_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_39655acb4c8e4cdba92e2f1bb1c86440.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d1518f-5401-47a6-99d1-4c8a4daf6ceb/gorirefuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9ed846-d973-4e59-a04c-0596f71b36a0/vusiridurifanezetoxes.pdfIn PDF document text
    • http://gefuwaw.atwebpages.com/deripuweminezare.pdfIn PDF document text
    • http://dixolasafu.epizy.com/sadubufupovikide.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/battlestar_galactica_1978_episodes.pdfIn PDF document text
    • http://lukoleni.epizy.com/marketing_strategy_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83637780-59e8-4744-8c14-c5a055532d4d/resevaralujajaxajugetu.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/40168576389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5377bc93-2488-4f20-ae45-fff5f75ea067/zosaboxutuvegarik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5929b84-e6c4-496e-9ba5-aed182238639/63958062724.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/banobupibali.pdfIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_74c9831cf2f34cd49ca0d36c208660f4.pdf?index=trueIn PDF document text
    • http://supajiwa.myartsonline.com/duxutetasowawarojijetub.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/dead_by_daylight_survivor_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/bjam_build_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/formation_and_metabolism_of_chylomicrons.pdfIn PDF document text
    • http://pejulok.epizy.com/37729511894.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_180f9da38f1b4a728f7c08b2fd51f045.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/vigutuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/homographs_worksheets_grade_3.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_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 5464 bytes
SHA-256: c94b82773f7141c22300397f3d48e43b909c1d651957cee4ca33561da1e9278d
font_01_sfnt_off0001031f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 10668 bytes
SHA-256: 732a066edfe72f35cfb4c69f87a3c14aa6834468f53c35b661134ffb69b73031

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