Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a9f84f37ef5079…

MALICIOUS

PDF

94.1 KB Created: 2021-02-11 04:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 881f24d3df3788ff3e2b8a6d55fb0db8 SHA-1: c5dd31f9bba92c5a637e7c7350da843b94be0cf9 SHA-256: 63a9f84f37ef507910bb2e7199dd8e06c3ab3602c6068088319ba721834b29c4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://jacksth.ru/123?utm_term=words+on+the+vine+answer+key+mal` suggests a phishing or credential harvesting attempt, disguised as a search result or answer key. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into clicking external links.

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://jacksth.ru/123?utm_term=words+on+the+vine+answer+key+mal PDF link annotation
    • https://cdn.sqhk.co/ketalidukepi/Scilhh2/castle_defense_2_cheat_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sepexapubu/gix4Ggc/ruronusezoxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/jijgcJn/the_lawless_breed_1953_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/ha2Qqif/narcos_cartel_wars_mod_apk_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fcf50d168118.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/Nhiifha/i_gladiator_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/hpKjbif/bluestacks_emulator_among_us.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hgCycrg/formula_car_racing_formula_racing_car_games_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/ghEu3Nr/40871920164.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/fdriaie/lethargy_in_cats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5ffce04364f36.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/nuselufuzo/95903644129.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/lejajegifuzegovaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/gift_voucher_templates_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/attu_rowdy_songs_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/bernama_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/59925296006.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/jasper_report_format_date_parameter.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/renoxixetedi.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/class_9_atoms_and_molecules_worksheet.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_off000132a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A5 5396 bytes
SHA-256: 65b7e5637ce2ba6b2309b454d15894e82f118bb14a7b45c1461e0d5c77b9c613
font_01_sfnt_off000144f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F0 11416 bytes
SHA-256: b679fc72536de920505c7f8c4731cfe9e6e1a8286ef62dcf5ad729398bd33e0a

Open this report in the interactive analyzer, or submit your own file for analysis.