Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5f99f697492b3f…

MALICIOUS

PDF

69.3 KB Created: 2021-02-09 20:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 31dd8c44492a18bb0158e8f19775899a SHA-1: 8957161a4f866aea9d16dc04bbc9c2b5c305bf3a SHA-256: ab5f99f697492b3fab0b7ada42acbc547a56c5eaf0092d65da7c86e521017a7e
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, suggesting it's used to redirect users to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to educational content, likely to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=greatest+common+factor+worksheet+kuta+software PDF link annotation
    • http://gamokidawenikon.iblogger.org/bahria_town_karachi_full_map.pdfIn PDF document text
    • http://lulezuzebat.22web.org/91239348426.pdfIn PDF document text
    • http://auth02mobility.com/46803091551qbtyq.pdfIn PDF document text
    • http://fitness1.space/waxosexn6g88.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/3gfha1b/coin_master_free_spins_hack_no_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/iiXrX5U/hangman_adam_page.pdfIn PDF document text
    • http://gratoraama.website/34405879075hko19.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/midaguvimabof/60587551748.pdfIn PDF document text
    • http://gipomafusabakix.rf.gd/sazajirerukewuxirugod.pdfIn PDF document text
    • http://zepibugab.rf.gd/sri_lanka_tsunami_2004_news_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/79169196457.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/besova.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/zikodunimiwijag.pdfIn PDF document text
    • http://daxafedijumexir.rf.gd/tanijeli.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_off0000ca46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA46 5276 bytes
SHA-256: 26b63d8ea472ce0ea85321c6368f91bbf79e3b0a3cff0c731c277ecdcac237c8
font_01_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 13212 bytes
SHA-256: f696b3a588d78684ee7776f9fa308d7d30498eb0ef8efaa2393fea1da7bd78dd

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