Malicious PDF — malware analysis report

Static analysis result for SHA-256 3913ee4b441d63d4…

MALICIOUS

PDF

39.2 KB Created: 2020-11-08 01:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 183ba0d67c73b63e88278bfce7a12938 SHA-1: 34b14866a5b7bef7fe2a2e01e27c8b456838c172 SHA-256: 3913ee4b441d63d4fa7896857335fc8b9177028dfb506443975a8123bf1174d5
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://traffking.ru/aws?keyword=em830+multimeter+manual In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/be3867667aa6.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/mexavofezoxi/time_capsule_letter_to_child_examples.pdfIn PDF document text
    • https://lusabun.files.wordpress.com/2020/11/etica_nicomaquea_politica_aristoteles.pdfIn PDF document text
    • https://s3.amazonaws.com/gonavo/words_that_describe_people_that_start_with_b.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/1313_dead_end_drive_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/lagalaxapovasoru.pdfIn PDF document text
    • https://sipodugegir.files.wordpress.com/2020/11/sustained_emma_chase_epub_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/wilajejuvaninetupezegodo.pdfIn PDF document text
    • https://lixivono.files.wordpress.com/2020/11/fallingwater_maggie_rogers_sheet_music.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_off00005b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B26 5108 bytes
SHA-256: 60a96881a925e6b3ab6d757a6b4328649b729644c89f82258b49fa1d278d4d51
font_01_sfnt_off00006c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C70 10604 bytes
SHA-256: 63ffc300f9881b5ec96156daad1dcce04037151fc4a0fd5cd6202393daa61160