Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fb2e113703ec19…

MALICIOUS

PDF

38.0 KB Created: 2020-08-26 12:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 97463a4b4204d554d1e8a56808ca43f2 SHA-1: de753c884f475ad8657afa86027401566d6cfdf5 SHA-256: 15fb2e113703ec19980ccf8bfc4050b0897b4cc394b0d6af130fb71ff7f6ae16
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.link/pify?keyword=asus+x551m+specs In PDF document text
    • http://files.whyharrelson.com/uploads/1/3/1/4/131453592/7922068.pdfIn PDF document text
    • http://famit.resonancehealing.com/uploads/1/3/1/4/131437252/f24a57f3ae64ced.pdfIn PDF document text
    • http://files.nusourcellc.com/uploads/1/3/0/7/130775071/8e61beb8c77f7.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/1/0434/6550/6966/files/9851857805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/48466749190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/82145106839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/bergamota_doterra_espaol.pdfIn PDF document text
    • http://files.alinken.people.ua.edu/uploads/1/3/0/7/130739678/f467322b73a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6406/6201/files/pembentukan_batuan_sedimen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/kabosum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/miruduzutide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/birds_images_with_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/45996792089.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_off00005415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5415 4972 bytes
SHA-256: 79d2d497d9deab5025f4258b91a0e90b96c320e71b67da685ca9dcfb0f3d9c67
font_01_sfnt_off000064fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 11180 bytes
SHA-256: ef865357fedabc0c89150bf88c90f36405207d8e5d7cc7f842bf198a930c3f70