Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a044c8a31adc5d6…

MALICIOUS

PDF

86.3 KB Created: 2020-12-27 06:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 439c016e21149488ca8b7dabe13541a0 SHA-1: e9c608cbe72d3e4a38110f4e47b35ae192c9a4b0 SHA-256: 8a044c8a31adc5d618159158a955998d0a783a65eee3d170f1ddc4972740e801
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. An embedded URI points to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. No scripts were extracted, but the presence of external URLs and the ML detection strongly suggest a phishing or credential harvesting attempt.

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://trafffi.ru/strik?utm_term=warships+today+asia PDF link annotation
    • https://cdn.sqhk.co/zazavoxujub/hdfGRjc/gudiwusunozewozavijimowum.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/jaqhaF0/26499718510.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/jhiny6o/ruvugukigizituxolofaxixi.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/Ajf9ZkM/levet.pdfIn PDF document text
    • https://cdn.sqhk.co/majatuto/Mn2Qhgi/super_mario_run_remix_10_wait_times.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/Zb2gjAW/74648923888.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/gibygh2/war_world_game_download.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/sizabo/30667892876.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/87055068077.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/top_english_bass_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/wataxejanowutudakuj.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/suwiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/butterfield_8_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/60483178227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ccafa0-4727-4720-839a-3111bc7d5007/kakowomuparogokuxoxi.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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 14152 bytes
SHA-256: a748fdd109a8a769a5bb004e20010fa4f486cb4b4029e94d844f3e9351168c2f
font_01_sfnt_off00010df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 5128 bytes
SHA-256: a5996e88d1fa1813192a19415a58a25e0744d4180ffebc1c3d8d45172fd45626
font_02_sfnt_off00011f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F79 14228 bytes
SHA-256: 8560d55dc3222774e42edacd2e15b05b02ebb322679ae5f1e56653b9bc9afaac

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