Malicious PDF — malware analysis report

Static analysis result for SHA-256 46db3e382e65e24b…

MALICIOUS

PDF

86.9 KB Created: 2021-01-25 01:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0197877f1e3d270c998f6cbf6fe9b73b SHA-1: 9505dd38198e1f577a8e1aeb7c0cab9dd3309b95 SHA-256: 46db3e382e65e24b9100a2fcff994d955068ff0496737ae12476901b4cbda380
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary URL, https://jottigo.ru/123?utm_term=silver+shroud+quest+save+kent, is suspicious and likely serves as a distribution point for further malicious content. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=silver+shroud+quest+save+kent PDF link annotation
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/vigotiwoxixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_5fd288f9327fa.pdfIn PDF document text
    • https://cdn.sqhk.co/gifidupuzuv/gcGaTxc/amc_mobile_movie_showtimes_today.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/KjeIKji/55743023493.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/jekozurujigibuwu.pdfIn PDF document text
    • https://tinuwese.weebly.com/uploads/1/3/5/3/135300683/3968073.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/caIhhmj/warhammer_40k_chapter_approved_2018_missions.pdfIn PDF document text
    • https://wajegeteb.weebly.com/uploads/1/3/4/8/134896445/towadirolix-dudezej-mukitasuvewi-dasakudiko.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/sogovekevi/adobe_reader_windows_vista.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/66486719327.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/52593776892.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/chikati_gadilo_chithakotudu_naa_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/messenger_ios_6.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/63653085862.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/bhanga_hrudaya_female_version_song.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_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 5264 bytes
SHA-256: 144a2ec3c721a9d66e7ed814e677d20c5f1aea43fda551b4d71a4a91dd31e5df
font_01_sfnt_off000125eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EB 12672 bytes
SHA-256: e02830563c601a8f800d79b64388fb65a00552db3037b5e090a1bad01398d3e5

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