Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5f09d226d29315…

MALICIOUS

PDF

80.6 KB Created: 2021-02-15 13:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d8081b75000a3dd64ecab3449d73527a SHA-1: 7119660be8edd977245db28722be6ae208189e15 SHA-256: fd5f09d226d293151a1711706234705e6449ecc135e7ddeee867fa854b1e1f88
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to interior design, which is likely a pretext for phishing or malware delivery. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=how+to+create+a+timeless+living+room PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffc2afc157a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_6014772db554d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_5fdb69624c9f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427498/normal_5fc7531b36ed2.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/P0rC4jc/62515821198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fe108ebdd8b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5fec7fffc8fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ff6d05688f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_600e874c02874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5ff4dfa67720a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_601600e4621fa.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/hgrjgsI/harkins_theater_casa_grande_az_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/kefaforuletu/jbZieEk/easy_origami_shirt_and_tie.pdfIn PDF document text
    • https://cdn.sqhk.co/supekolev/B8Bjfda/herpes_simplex_keratitis_eye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_600d9ff5e5369.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/titugome/xenejawu.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/wexag.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/xajulogalunag.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/rasofufanovu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/genetics_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/xifajatazan.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/clash_of_clans_hack_aptoide.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_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 5232 bytes
SHA-256: b6ff22d181f299aed2de9714cdaea532995ba31fac32f29eaee32e2754c7ac2c
font_01_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 10760 bytes
SHA-256: eb43607f396ca81db221327a0d5c8e1d154068385c313d8d9e0f33a58f513b4d

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