Malicious PDF — malware analysis report

Static analysis result for SHA-256 67681ab65e7f9f03…

MALICIOUS

PDF

41.7 KB Created: 2020-10-09 09:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e54b0ccce7660fb7f03eb34e49392c77 SHA-1: dee98604c288ede45d8853aba43bf06436e19886 SHA-256: 67681ab65e7f9f0378b1b9df2e9dc93e99147cebf34786242c4847c766356b28
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://gettraff.ru/pify?keyword=electromate+400+manual In PDF document text
    • http://files.velez.com/uploads/1/3/1/3/131381464/vowubuseb.pdfIn PDF document text
    • http://files.aerospades.com/uploads/1/3/1/4/131410872/rewanibexi-gisaramo-zaneneke-motes.pdfIn PDF document text
    • http://naxijesig.aawcphilly.org/uploads/1/3/2/7/132740541/bexiguw.pdfIn PDF document text
    • https://site-1044192.mozfiles.com/files/1044192/xonolapurugoka.pdfIn PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/1284542076.pdfIn PDF document text
    • https://site-1041933.mozfiles.com/files/1041933/jajosanudokuzanatujatexi.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/6367979321.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/1/0501/6934/8261/files/babojivazatuboxidoreju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9287/6705/files/bajekuvotinikemupafelunuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9168/1176/files/two_trains_running_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/nj_light_rail_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50a2df6-0b28-4246-8380-32dc804458a0/valanavevilokeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52802c94-ff2e-4245-b2f2-f876907c7ba6/48689576741.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_off00006630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 4952 bytes
SHA-256: d8296b15155882b684f0f24e68db293bb3a4584c0dbd47d9ab0ba2c34349c0f9
font_01_sfnt_off000076f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10412 bytes
SHA-256: 986f060dbc453af52cef48bb60a9ed167c579caf567bf5e7152a7a19b4d1847b