Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0067ed23d6c134b…

MALICIOUS

PDF

85.8 KB Created: 2021-03-18 22:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 636db6b29c63a48fbe1516b4c3486f71 SHA-1: 10cd6925d9876a7b55f1c7ee54b5cd86490ea2d7 SHA-256: d0067ed23d6c134bcf74cf853e0c0b5f912e60946b18196e27747c0d751ff638
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing or trojan threat. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the attack pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=citizen+automatic+movement+review PDF link annotation
    • http://gifinibufenatar.medianewsonline.com/40543098863.pdfIn PDF document text
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/5716705.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/30118548963.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/dezeba.pdfIn PDF document text
    • http://complerbnp.com/how_to_get_pilot_light_on_boilerpn7hp.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/898046.pdfIn PDF document text
    • http://tekplafond.xyz/intermediate_fetal_monitoring_6th_edition_test_answerseh2mo.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/61893878456.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/gurafoga/fifetufefividuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/noxikewuzuwumobafatazejus.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/86233741304.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/fire_stick_4k_android_apps.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_4745e8a507d648d0a3f4ab31360dba6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/mizor.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/the_four_chinese_movie_cast.pdfIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_c4d215c7d94046ea851cd55603b582f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/lamegabejapemuboguxaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/39806327243.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_d35a4f65be5e446d85edf40cd13323bf.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_d92805fbe5ba4fb2b56e1f2c50631f83.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_2e41dbf359d242ba8783156bf083ea72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/18796871747.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_off00010459.bin
cea0be5660b2f7406d1f165c2cdfeea4d442e2c229faa75247cb91165ef400a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10459 4844 bytes
font_01_sfnt_off000114cf.bin
63f14b4597d9825e8bd4ee6a82ac6a0fd9b0027deedec3470f9041d2a33f7a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 11432 bytes
font_02_sfnt_off00013b2e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 4324 bytes

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