Malicious PDF — malware analysis report

Static analysis result for SHA-256 5813ccef8a691d83…

MALICIOUS

PDF

45.1 KB Created: 2020-11-08 20:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a4da4c3e27ed90f3fca40d1830f59f65 SHA-1: db33c5f4364ada1edbf2c0ea8f3bfe81279d6c3b SHA-256: 5813ccef8a691d83abfd32257a37cee513d6d0d4668d68085d7ad474d44cf86b
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/123?keyword=songhai+empire+economics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5fa176505a4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87041e7bac4.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://panezij.files.wordpress.com/2020/11/modern_tkinter_for_busy_python_developers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aeb6f04-3972-41ea-bb20-f87f5bf8d6b1/ori_double_jump.pdfIn PDF document text
    • https://xepaxaw.files.wordpress.com/2020/11/adjectif_possessif.pdfIn PDF document text
    • https://demuwexofu.files.wordpress.com/2020/11/terraria_calamity_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be54aa24-7aa2-4f7a-a612-ed00db3941ca/98266397405.pdfIn PDF document text
    • https://biloduwez.files.wordpress.com/2020/11/rsd_max_the_natural.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798db77b-43ff-4ae2-9bbc-1a2a17485993/9895414250.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_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 5124 bytes
SHA-256: 7a8757c3c22ef404849ed57cd7d29abb8851d62dcd671ffa369819a105394702
font_01_sfnt_off0000787e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 9828 bytes
SHA-256: 214dba52478242c452b84fc39fd7782cc4a1bc1f9f79c5ab821bacce174712e9
font_02_sfnt_off000099e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2