Malicious PDF — malware analysis report

Static analysis result for SHA-256 0373606a5626c0f2…

MALICIOUS

PDF

53.6 KB Created: 2020-09-10 13:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2198c0de688a8bf4fff019574d0225cd SHA-1: 34bcbba71ef064fb38145228816401c1a12c7b4b SHA-256: 0373606a5626c0f2a38b1387fc284c550b76310f5ab1e377a439cd186be42b65
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.me/wix?keyword=bishops+high+school+guyana+uniform In PDF document text
    • http://files.kindergartenklassroomkonnection.com/uploads/1/3/0/8/130873937/tobezamusol.pdfIn PDF document text
    • http://rerepis.youarethesalt.org/uploads/1/3/2/6/132681670/pejelifofakin.pdfIn PDF document text
    • http://files.biljohnson.com/uploads/1/3/0/7/130738752/202044.pdfIn PDF document text
    • http://files.kristenjoybaker.com/uploads/1/3/2/6/132681976/20d338cbce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b80405_3371ad297c1d4d62a8d7681962b55532.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eb4bd_d665e3620fde4a06b0cb43943043ac4c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/368de4_57992928057243bf996132796b6bb7d0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8243/0117/files/nirekovepujekab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4044/8410/files/desk_ergonomics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/95394298498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/28036466499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0531/9831/files/35680918128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/dabureromukolerepukir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/19553606779.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5580 bytes
SHA-256: 7e451d6bf00a1f03ded2071d835c6b3476f848613c3f7b4c2717512cae9d9cac
font_01_sfnt_off0000759c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759C 9228 bytes
SHA-256: 8770144c4b514e39502a76197562a7e38640554fdf562c11a1367abb3bff75f8
font_02_sfnt_off00008eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EED 10372 bytes
SHA-256: a8386e14d5358d7c4a14d4a3bc05ebd3d807d0a9be6a3d78729a9f4515546a9e
font_03_sfnt_off0000b29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29F 16548 bytes
SHA-256: bd21da396ea8fa966a7baa0c21929a17de815842f83ac5d5661fc8b792ba03d9

Open this report in the interactive analyzer, or submit your own file for analysis.