Malicious PDF — malware analysis report

Static analysis result for SHA-256 5087aaa32005f17c…

MALICIOUS

PDF

82.3 KB Created: 2021-02-17 04:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 24ab97db39c0a8ebad3c7712b1253252 SHA-1: 4c18ce72d85e933bcadcc29d83b290bd005fc94e SHA-256: 5087aaa32005f17c01df7423e98be92e5a572a4c31bafe4ceb0c65518234e84b
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 embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=chapter+6+answers+the+outsiders PDF link annotation
    • http://pekibule.iblogger.org/bncc_2018_educao_infantil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371788/normal_5fee359646ea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fc777e7ea004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422876/normal_5ff2d2ef71337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_602b7c2a25390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_602ada2a913bf.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/sedowedi/domain_hosting_website_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/35638385278.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/81655197302.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/american_college_of_rheumatology_guidelines_osteoporosis.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/kegeruwoxunetoko.pdfIn PDF document text
    • http://davafegi.epizy.com/adornos_navideos_manualidades_para_colorear.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/maine_pyar_kiya_full_movie_123mkv.pdfIn PDF document text
    • http://jivurikevovuwud.epizy.com/cartoni_animati_anni_80.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/pajagip.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/balonirifutujefanomaluti.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/traduction_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/7720417899.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/love_good_morning_photos.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/13817046849.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_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 5164 bytes
SHA-256: 8a0aaa57348c3ac3601b986a59b6792de7846c14ba587ea27aefc12bc64d7e3d
font_01_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 10352 bytes
SHA-256: 15379f9b00a7ba0689c5ecde75dc38bfaf24e0e6e5d12131de0b5629e47cd645
font_02_sfnt_off00012d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D42 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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