Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9ad88c34e47cda…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 06:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 50022eb92e67cfad1cae07fba9852cd0 SHA-1: 41ce977b74fea7aad70f9ed3e11d04d0695c193a SHA-256: ea9ad88c34e47cdac567b9b3f3b91dc74632f8754cf864b4784de4c329cd5726
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=itrip+fm+transmitter+instructions In PDF document text
    • http://vodabutopidaru.getenjoyment.net/lijirur.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/47077868495.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/what_questions_to_ask_hr_manager.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/grade_3_writing_book.pdfIn PDF document text
    • https://witomoniwitu.weebly.com/uploads/1/3/5/3/135317652/2273745.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/the_divergent_series_insurgent_full_movie_in_hindi_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/forupokisip/angular_template_example_plunker.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/femezexusi.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/super_bomberman_2_nes.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/52302848514.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/75991733769.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/45932701199.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/42870905230.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/dark_shadows_episode_guide_1966.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_off0000cfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFF 4948 bytes
SHA-256: af83aa9cdf800412b45ee827f1095d523af2ab0679a687955c5ebe1ce19a46e6
font_01_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 10984 bytes
SHA-256: 8571000184e43aaa090a02edc5530e92b1908b0fcae7b46748f1a5b4cb94d2aa
font_02_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3