Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0d8155c8ab8414…

MALICIOUS

PDF

49.3 KB Created: 2020-10-03 21:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aca4336c4a9079c3d529cef938f60a8f SHA-1: 9dcfa308c901ddc554548211cadc1318d6fbf1e5 SHA-256: 7e0d8155c8ab841468a0b18c8e44fe0754f35be653222efaee4fbaad17034282
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.club/pify?keyword=rhode+island+college+calendar In PDF document text
    • http://roposola.valleyvintageshop.com/uploads/1/3/0/9/130969628/3860056.pdfIn PDF document text
    • http://files.berrysleek.com/uploads/1/3/1/8/131856176/046570e359.pdfIn PDF document text
    • http://pogefow.aspireinsurancegroup.com/uploads/1/3/0/7/130776131/bokuxake-detubuv.pdfIn PDF document text
    • https://site-1040574.mozfiles.com/files/1040574/93902057207.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/83810437659.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/16268125896.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/94898883175.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/gepegaxivulotavidawuzavi.pdfIn PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/23443796693.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/xafumulebe.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/1/0431/7839/3762/files/mabujixifufobinimuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/black_hawk_bird_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/8666/9733/files/citrus_county_skyward.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8389/6734/files/classifying_chemical_reactions_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/manilla_postcode_australia.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_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 5208 bytes
SHA-256: b1257f0b737961fe116569f815bba033bda22854c11fca5f8cb52e4e29461df1
font_01_sfnt_off00009435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9435 10588 bytes
SHA-256: 0deca8306679009d0a9e76f9394916a63ca55a1b5d64b436cdbf91f2c202ceb8

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