Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f99430e45eec65…

MALICIOUS

PDF

40.1 KB Created: 2020-09-29 22:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 954dafe8e8f9491bbe7f8e063cf26e3e SHA-1: 7e449ee87798d14dfbcfeb2c172f46486f806e8e SHA-256: 48f99430e45eec653d4a2bfd25b03d741a3167a33478423ae491a9d142b50bb9
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=al+nahar+kuwait+pdf In PDF document text
    • http://files.wmfhillinc.com/uploads/1/3/2/6/132683014/suriwo.pdfIn PDF document text
    • http://files.pamelacalore.com/uploads/1/3/0/8/130814187/2047647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4603/5607/files/44494117221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9247/6834/files/beginner_gym_workout_routine_female.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8788/7526/files/35511670674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1961/1555/files/mowusixilarowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/instagram_app_for_android_4._4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1874/9605/files/forge_of_empires_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7542fe47-c852-4ab9-8480-9c5295cb52a6/17894237101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11de7f8-f438-45ab-a667-739dae72e74f/49184987538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508fe900-5dd3-4a97-bbfe-4c68084089f6/lovuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b060437f-6559-40d5-8514-b141e09b2c8d/95656568584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f905ba-0c9f-4aad-9265-94c08f12d155/86501533237.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E6 5096 bytes
SHA-256: 995f43f636e867ee470ed7bed14fa013a15d579c578a3b4e032d6cfcadf02a81
font_01_sfnt_off00005b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B46 9896 bytes
SHA-256: 3c8793e8b24d8cccab1f6d0d8bf71b6c158ffd4f3a63888a81c63ff0cbb1dd6c
font_02_sfnt_off00007d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 16484 bytes
SHA-256: fac977359d68d71e1fa06479d39fe177eb646975385907dac9e9d251177699f5

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