Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1af58cbd6515f76…

MALICIOUS

PDF

43.9 KB Created: 2020-10-07 02:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 441874538ce2d061333df6b9d7b4b0e6 SHA-1: 70733af340f9c79d4f549893b5b76c94357315e9 SHA-256: f1af58cbd6515f762c13b475627cb3f66d031ded76fa14f1e5380296bd661a15
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://ttraff.cc/pify?keyword=roller+coaster+physics+worksheet In PDF document text
    • http://files.stellalunamediamusic.com/uploads/1/3/1/4/131453350/4977814.pdfIn PDF document text
    • http://files.vejudo.com/uploads/1/3/0/7/130738919/79964.pdfIn PDF document text
    • http://files.sciencesnail.com/uploads/1/3/1/4/131408415/46695b71.pdfIn PDF document text
    • http://files.christchapelmaine.org/uploads/1/3/2/7/132740798/5ee8e11af2.pdfIn PDF document text
    • http://tomukavas.goodfilmhunting.co.uk/uploads/1/3/0/9/130969937/d010994f50dcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae476de6-663f-4f6d-8884-0ce9155c275f/63735023390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb5b74c-515b-45c4-b872-1643101627a1/24447308580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28ca4b2-80cd-4c02-ac44-6e82a0cbc406/nefudebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d101ac4-0889-4d50-b0ae-0371a678af3a/64300516297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5690d8e-f1b6-4789-90a5-387f8545c69f/joxedukesosukokegiril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1910/6461/files/rock_cycle_comic_strip_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1995/0485/files/74869864755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1672/2331/files/xixonoxabatokuwozoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/watatoputofevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/35788921575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7084/1766/files/air_hogs_helicopter_with_wheels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6575/5798/files/nvivo_11_software_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/summer_camp_flyer_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7096/2843/files/dokofajomokexuridewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/commas_in_a_list_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 5288 bytes
SHA-256: df7f5bef1547b5c7d4e52882c1d7838073be6d667472b767d0c6214c3d20dd75
font_01_sfnt_off00007e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E12 10504 bytes
SHA-256: a3e730008a61965814c59cc659cf1c610093e9c47a9ab97e0638b96b77e7a83c

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