Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b4854cb1128310…

MALICIOUS

PDF

73.9 KB Created: 2021-02-28 20:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5f9b467522caf2de01266fb8b70f4593 SHA-1: f4c0d272a49beb57d7a8279c6c1e998af33a04e6 SHA-256: 22b4854cb11283102f9d3019d11363142a0269ad2718d685f709e6148d68d6cd
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. It contains numerous embedded URLs, with the primary one being 'https://botokaw.ru/strik?utm_term=how+to+read+a+birth+chart+astrology', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest it's a malicious PDF.

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://botokaw.ru/strik?utm_term=how+to+read+a+birth+chart+astrology PDF link annotation
    • http://haustova.com/gba_emulator_pro_apkrirq8.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/90455154221.pdfIn PDF document text
    • http://hook-up.fun/462519198637orxi.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/63jadhf/formula_1_2020_ps4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/YKsDLnC/37155439422.pdfIn PDF document text
    • http://afracheat2.xyz/zevufimederejujuxodaczuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/cjfD3ji/47999264761.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/cNc7aro/download_game_helix_crush_mod_apk.pdfIn PDF document text
    • http://1fps.ru/lirobaruturevonoxexry7z.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/jjSDYhb/measles_disease_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/YAieghp/pipuwelakuperize.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/gjeheRT/demajogibe.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/Zhf8L9q/nututo.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/megodipewukitoj/16785992896.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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 5496 bytes
SHA-256: ae863d32962811df657e9597aa06708ad56c6bc67553e942024fea320ac745be
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 10680 bytes
SHA-256: 92cfb821aff4d690fb24e9909d27013087719959d4e07f4a531950d6005637fa

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