Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c138b928652cab…

MALICIOUS

PDF

77.0 KB Created: 2021-02-08 19:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 494baf8aa0ad5a70f5417931c32556c4 SHA-1: 720f8ece91117f1f32b5e1e087f23651a99a5cbf SHA-256: 45c138b928652cab753caab87071a3a31c6fa93504389eec4ca4c8e32e7b0666
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a movie download link, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall nature of the heuristics suggest the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=evil+dead+hollywood+tamil+dubbed+movie PDF link annotation
    • https://cdn.sqhk.co/zafowavo/ijbhchb/mega_empire_clash_of_clans.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/hgi0tii/dapulewetajejosi.pdfIn PDF document text
    • http://astrology-personal.online/gitofukopofuvubujoec12z.pdfIn PDF document text
    • http://freshka.fun/nacte_admission_guide_book_2019_202ij55.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/jaij2IM/minecraft_pixelmon_map_seed.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/ifgHWf3/e_config_of_potassium_ion.pdfIn PDF document text
    • http://golden-bridge.pro/agisoft_photoscan_trialuzuqt.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/ggedicC/tafiwujulimawoxinori.pdfIn PDF document text
    • http://tonagruz.ru/razagototesegewbi4hu.pdfIn PDF document text
    • http://mifvideo.space/duik_16_user_guide28snn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zupenafud/lesion_de_la_arteria_cerebral_media.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/ap_biology_exam_review_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/cuboid_mini_manual.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_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 5140 bytes
SHA-256: 34ff97e5fa62e1cdf76b7d294d306f10be679517f22a1d1944b2f52df6566d03
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 10564 bytes
SHA-256: 30a730ac4f27dafd4b93d8e6cbaf3f778e6aa43be4555bf37612fc323936c517