Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb06f7d882c86aa…

MALICIOUS

PDF

89.1 KB Created: 2021-03-09 22:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d52e2688fc87f6654e9300b1638907e2 SHA-1: 261ff84cf3b48bf99785f3e88022651107736047 SHA-256: 8fb06f7d882c86aae3dab4621dde89215a7ecf65f7b999e2e1de875abd7bd977
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains a search query related to 'wimpy kid series' and an embedded URL that appears to be a lure. This URL likely leads to a phishing or malware distribution site, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=how+many+books+are+in+the+wimpy+kid+series PDF link annotation
    • http://watogoda.mypressonline.com/penifavenisuvavajarabupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_6021e912f2b81.pdfIn PDF document text
    • http://fesavuxofogegil.iblogger.org/42505101723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5ff6936f8f0ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ffa0e3526c22.pdfIn PDF document text
    • http://golixudib.mypressonline.com/white_tiger_marvel_netflix.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/past_tense_regular_and_irregular_verbs_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366367/normal_6000bc1e05655.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidotafezanu.epizy.com/47417347904.pdfIn PDF document text
    • http://sadizoju.epizy.com/50072869687.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/dipobamejonanu.pdfIn PDF document text
    • http://suluzisose.rf.gd/answers_to_happy_birthday_wishes.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/linksys_wrt110_rangeplus_wireless_router.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/behind_enemy_lines_2006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abc9e29-83ff-4246-a121-ae07648f8a70/76974516523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a3f180-e87c-42bd-916d-b7ad71ccd704/soxixemudena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fcb5b5-1237-4d9b-a542-d2e1c1f43974/ejemplos_de_diagramas_de_flujo_en_programacion.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/11809095281.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/how_to_use_the_sodastream_spirit.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/ed_sheeran_justin_bieber_i_dont_care_lyrics_az.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/beginners_guide_to_investing_in_stocks_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/xewinimeni.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_off00011a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A41 5524 bytes
SHA-256: be7c34d42d5e732a5c42c4ef189f540de8d5862ec4b6ce621863e3316fd9c55d
font_01_sfnt_off00012ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE9 12748 bytes
SHA-256: 1b02098558e01541456b95b70f7d81ac7a8856f3fa3de22792e203799fe34e84

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