Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8143ad4b313d2bb…

MALICIOUS

PDF

46.7 KB Created: 2020-10-27 04:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 4e6e7a19b70895e0d3638cfe15742365 SHA-1: 93c755a29d9ed52685cf5aab9c64066181367055 SHA-256: b8143ad4b313d2bba8088c96df5a4515f548c059465fcba93890b594437e425c
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://cctraff.ru/pify?keyword=coleman+cold+heat+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5f945376a7f69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8732f8d9135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f915d78730d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f93580d6d6c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f94cbdea950a.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/1/0268/8503/0069/files/verbs_forms_list_v1_v2_v3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9359/7601/files/64321828379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1593/7441/files/vidifenusenadaxexonuzutus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/go_launcher_z_old_version_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4868/8552/files/free_printable_algebra_worksheets_integers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2862/7623/files/na_hum_bewafa_hain_song_download_wapking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2484/2391/files/gizel.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/60805507441.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/growing_up_with_a_bucket_full_of_happiness.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/brain_on_fire_susannah_cahalan.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/1485322756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/94015899685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8234/3103/files/mtg_return_to_ravnica_draft_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7807/2505/files/xuvizowukekireboni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/wuworegimikeroxogeledi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8786/2429/files/85999968475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df431da-1c01-4c81-b230-bf9d954af32c/frozen_pelicula_completa_gratis_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2339d46-50c3-409e-80be-7861f1b77ea9/9904710664.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_off000076d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D8 4808 bytes
SHA-256: 87e4cd92929536b444c852449cfa3d0ed3ec72a4cc03be5e23586d3807461a63
font_01_sfnt_off000086fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 11616 bytes
SHA-256: 3aea260a7fc6dcef8b83cfb1ff099573b5dbb39dfa9df1b26665c6d6aa1d418f