Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b036e0621f617c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 03:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e20cc52fb5ffe37d80a00a7a92964eca SHA-1: 7fbdd605b828d82d265c61c22aa3cefc6305016e SHA-256: 67b036e0621f617c2e10165ff9d5c5710d568d675be8be2a98326003b784aeb7
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.ru/pify?keyword=tu+bichdan+song+whatsapp+status In PDF document text
    • http://files.btagusa.com/uploads/1/3/0/9/130969960/nizamemu-zuzegajogolo.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/1/0434/4096/3750/files/45638152819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/gobafovetuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/tolomiwigafutarimetibito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/zaxadedifugenibisijir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8104/4902/files/apomixis_en_plantas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0328/0551/files/94796980367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/52066141513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/65946323818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/88328232427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/costco_cheesecake_nutritional_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3201/9097/files/digepakagesixamosum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/call_of_duty_highly_compressed_100mb.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_off00004be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE4 5152 bytes
SHA-256: 00d85268a8bd75683788c87a45f9f123372bb2ccdfcd7bb9e07f1987046c40fc
font_01_sfnt_off00005d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D62 13056 bytes
SHA-256: ffefc39476a4691a6ad6d587eed6ce7b0bba16acbf4d75dab74a1b05574fcba2
font_02_sfnt_off000086b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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