Malicious PDF — malware analysis report

Static analysis result for SHA-256 0156aeabea342943…

MALICIOUS

PDF

35.5 KB Created: 2020-11-08 05:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cbf90aa5f39769002fbd18c4bbf20f74 SHA-1: 9e5ea1d45daeacbb4f707ecc090acbacde710275 SHA-256: 0156aeabea342943b17bf290b647166ce7c564053458ddfd86b72c1aa5a43d9c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/aws?keyword=loose+lips+lyrics In PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/3a10519.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/lakadutof/sscn._bkn._go._id_bisa_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/adjectives_to_describe_character_and_personality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a683de39-1ad7-49c4-9d6c-7a8272281578/icnd1_exam_questions_and_answers_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tradiciones_cubanas.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/nusavofikixodejat.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/81641509605.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/ammonium_sulphate_fertilizer.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tesilited.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/keradefogebipapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fd78fc-3bdb-421c-834f-11f16bff2d3c/lexuwakibovolovamuzozine.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_off00004f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3A 4760 bytes
SHA-256: a5d8187e636b594eaa2276d832eb9c059972f3a450f24b72aabb5a46cc1f1495
font_01_sfnt_off00005f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 10040 bytes
SHA-256: d088e210c28f63b26c727c8544339f773f5174b7d476bdda7849e149c9ed41f5

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