Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e53529fa8d69f8…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 01:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 580e6c2430bc92c2bcb9b202fd3364b6 SHA-1: 9cab0ce47a6be3006ce8f8f43c90f693b8cdc5fc SHA-256: 26e53529fa8d69f875e4a21203e8db548f770c68e48cd73984e8bb09a2129a42
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially garbled, contains text related to 'Aspergers symptoms checklist adults', suggesting a social engineering lure. The embedded URI points to a suspicious domain, likely intended to host a malicious payload or phishing content.

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://bologen.ru/wix?keyword=aspergers+symptoms+checklist+adults PDF link annotation
    • http://in-arenas.com/5186385214phpt.pdfIn PDF document text
    • http://uuuuull.space/avid_pro_tools_s3_manualwfq2e.pdfIn PDF document text
    • http://eferevole.com/bojangles_nutrition_bo_roundsz7nfb.pdfIn PDF document text
    • http://pop-marketplace.ru/dnr_form_arizona9wy2z.pdfIn PDF document text
    • http://kyukty68.xyz/rebel_inc_guide_southern_desert9wclv.pdfIn PDF document text
    • http://raffle.website/radiation_island_full_game_apk_downloadxuvti.pdfIn PDF document text
    • http://snatural.space/free_video_downloader_chrome_browserfps2m.pdfIn PDF document text
    • http://cashbackmoney.info/shabbat_amidahpq8v5.pdfIn PDF document text
    • http://instapriz365.site/pikemelufb9e.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/legipalofi/chrome_site_ssl_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/tosetevoku.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/payroll_budget_template_excel_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/vs_code_format_code_shortcut.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/veguginurebe.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/3052176283.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/answer_key_nts_tt_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/fimokivipikupufutak.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_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 5644 bytes
SHA-256: f1bb1b68c93004a9fe744297b6df05da1d3ae9a3ee166f13290e614b18c0cb16
font_01_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 10184 bytes
SHA-256: ebd935b3aa3a12597c0d382c362ff3e9d14a8d0bcca570dad8c342809fe18821

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