Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d7828a0dbc5ec0…

MALICIOUS

PDF

44.2 KB Created: 2020-11-01 07:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aaac661e407ebdc0fa58d5e718430c66 SHA-1: cccbececf68c6981924caad37620a24baaaa2c4b SHA-256: 53d7828a0dbc5ec0c34e1ebd2ac5c415bccc6acfe44f220ef864760a41db6351
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/pify?keyword=vortex+scope+mounts In PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/wabunuridojoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5f94ee3dadf2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f872880488f7.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/61f82309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f984dc5dfaac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5f95c75a0a6cf.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://cdn.shopify.com/s/files/1/0502/6797/9958/files/les_troubles_du_sommeil.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/maths_textbook_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/8321633148.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/318488621.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/geografia_de_colombia_igac.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/protocolo_sonda_vesical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0204/2789/files/sobizef.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_off00005fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 4704 bytes
SHA-256: f0f34f8ff7e439656862eb8a457d0f50e21d640e9713364ada2e5c32ac17d0f3
font_01_sfnt_off00006f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 11260 bytes
SHA-256: 64cde4a87cec5101e0c7533c292badf38816ddc765164ff507d87772847e50c3
font_02_sfnt_off000095de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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