Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ec1dd302018a70…

MALICIOUS

PDF

78.1 KB Created: 2021-02-13 01:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 95867863cf246b5200fa79f3ad6c19ac SHA-1: f707dee29cc39c72e60e2b6c56f031f68f5c9e11 SHA-256: c1ec1dd302018a70c5c8e962fcf34545a1bce3adaa9690504b48a63ca5a3b064
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for educational content, likely to trick users into clicking it. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF_URI heuristic confirms the presence of an external link. While no scripts were explicitly extracted, the nature of PDF malware often involves JavaScript for obfuscation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=chapter+28+to+kill+a+mockingbird+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384464/normal_5ff8770988be5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411481/normal_5feb1ee9bf70f.pdfIn PDF document text
    • http://mofolaz.22web.org/adobe_reader_12_free_offline_installer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_60125363b8dd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5fcf698d858d2.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/wiwuxot/surah_yasin_al_kalam.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/65038340162.pdfIn PDF document text
    • http://tuxefefili.epizy.com/kubobovigi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/dictionnaire_synonyme_francais.pdfIn PDF document text
    • http://resodexapok.rf.gd/braums_dietary_information.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/friendly_letter_commas_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/attagasam_songs_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/dovenudapibopa.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/51481431027.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/tube_to_tubesheet_full_strength_weld.pdfIn PDF document text
    • http://xoxepilazif.rf.gd/define_rational_canonical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/backendless_android_sdk.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/causas_del_abandono_animal.pdfIn PDF document text
    • http://voginafukut.rf.gd/jigri_yaar_rupinder_gandhi_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/45860053969.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_off0000e663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 5920 bytes
SHA-256: ffb992713da0ff847aba99d37ccab0740abb9896be0cb302b4034d8462acd509
font_01_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 10068 bytes
SHA-256: a0a0c7fed76dfdb37927ae518fe77472c511c0d3f1b44315026deab3483e3fe4
font_02_sfnt_off00011cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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