Malicious PDF — malware analysis report

Static analysis result for SHA-256 49150f655dbee5ed…

MALICIOUS

PDF

78.9 KB Created: 2021-02-13 19:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7f3c27c2214b605c075aa74a30dc7934 SHA-1: b7306ac763d7d8a5b72785f5bbc861cb63a16fe1 SHA-256: 49150f655dbee5ed33b1b9fe11555b1083380ede29ceab1d75547c6eb005dc89
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-confidence heuristic firing for a redirector link, specifically identified as a 'free-download phishing' lure. The embedded URL, https://seumenha.ru/wix?keyword=sword+manual+knights+templar, is the primary indicator of this phishing attempt. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=sword+manual+knights+templar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fe3897078fd3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/4EYjcSz/juzerapuzevinikezul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462714/normal_60212c6692137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a99e47ecf.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/jojowipojotama.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/be22c8e.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/iahiic7/street_racing_car_traffic_speed_3d_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/uOrsjgs/20189455219.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/gitipelut/xaxomijanajubelapojuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/color_sheets_for_kindergarten_students.pdfIn PDF document text
    • http://datasixiva.epizy.com/conflict_at_work_interview_answers.pdfIn PDF document text
    • http://sikofus.epizy.com/youth_worker_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/galaso.pdfIn PDF document text
    • http://dupivet.epizy.com/chameleon_apk_latest.pdfIn PDF document text
    • http://vumupekosevi.rf.gd/balance_sheet_financial_statement_assertions.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/74344410051.pdfIn PDF document text
    • http://punegejofuj.epizy.com/bulafu.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_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 5632 bytes
SHA-256: 528dd8c088ed90ca93814a7930a2c7098c44d0b9d01bf6dcf5098913596e8cb6
font_01_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 12732 bytes
SHA-256: 5d557f722dad5905aa6d016ae118706e607a719100ff660f8e3f89b770e30ec6

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