Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f9efcee95978cb…

MALICIOUS

PDF

80.6 KB Created: 2021-02-17 04:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a06d531d2e684fe4a9983917d9fa2a63 SHA-1: bb43f25513a1a512be310fdd06b05f31727711ce SHA-256: 92f9efcee95978cb9a441262b8bbafd0ebb861a7deee2e1903910a72856d8927
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to universal remotes for DVD players, which is a common tactic for phishing or malware delivery. The embedded URL points to a redirector, and ClamAV detection confirms this is a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=can+i+get+a+universal+remote+for+my+dvd+player PDF link annotation
    • https://cdn.sqhk.co/rigepasemapa/gdhhKFB/super_placar_resultado_de_ontem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_600cfa88be4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fe7a1cae0450.pdfIn PDF document text
    • http://majelogajizivo.iblogger.org/bundelkhand_university_exam_form_reprint.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fc93686600c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_5fe87313591c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458150/normal_5fcaacab3117e.pdfIn PDF document text
    • https://cdn.sqhk.co/jorevagu/64jgfhg/pojekenifopababerikiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5fc7d5f789740.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/giRgjD7/age_of_apes_mod_apk_download.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/jozaponi/shared_calendar_app_apple_and_android.pdfIn PDF document text
    • http://wawuzir.epizy.com/80799655203.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 5428 bytes
SHA-256: 1c7d1751e9d32794a1f67657f148651aa1132d0196f0d461336eaf2a39b40d9f
font_02_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 10628 bytes
SHA-256: 4be5246694581c6fb3eb00ae7a0eb843e426a1f2c68f1a361c0ed7abe13bcbd5

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