Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5aca85f47fab08…

MALICIOUS

PDF

63.7 KB Created: 2020-08-13 03:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc37cd46cd919b549abb10d0346365ff SHA-1: 628e4e0e14687cfc285812daacf2439867ec55f5 SHA-256: 3d5aca85f47fab080b4e1263d0cdec985f3021cef0d0aa012b2a9dae896e2e0c
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=capit%25C3%25A3es+de+areia+jorge+amado+pdf In PDF document text
    • http://files.152811427883146431.com/uploads/1/3/0/8/130814926/ecf835.pdfIn PDF document text
    • http://files.tanlaagoura.com/uploads/1/3/1/3/131379277/8851646.pdfIn PDF document text
    • http://files.newellbooks.com/uploads/1/3/0/8/130813797/vapujulo_rajeker_vewidufe.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/xurodapumipoxomalev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/vifaturule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8801/8598/files/zefuridebumux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5591/3879/files/faxibizajanibunuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7075/8820/files/australian_english_phonology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/78302603322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fafewemozawovukuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/balarama_digest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/michael_burawoy_manufacturing_consent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/55957122204.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C7 5428 bytes
SHA-256: 73f230108888af93c29ec88a13d9bcc58eda23b8a871ebac8d71b0ff4d5ec956
font_01_sfnt_off000096af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AF 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000a213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA213 12484 bytes
SHA-256: 9fda52a9a18d3c46454cbe316ae58cb3fbd71dbbfc7b0616e7cb8eebddf83d29
font_03_sfnt_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_04_sfnt_off0000d5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EF 7028 bytes
SHA-256: dadc77c5cd4d65e2f609b5a32435d417434440ef38ff88f903b50c6a642bfb26

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