Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0924bc98a25b12…

MALICIOUS

PDF

36.2 KB Created: 2020-08-21 11:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed5e5bd3c904ac9e7941caafbdd9db65 SHA-1: bcc4adb148f0e3f48ba7e0d09f3276ffbc0bff22 SHA-256: 0f0924bc98a25b125fcf726f333c4fd5d940f10f43bbcd18c8ebcdd27e26d7d6
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.com/pify?keyword=apple+service+diagnostics+3s156 In PDF document text
    • http://rojurokiz.valiantwaters.com/uploads/1/3/1/8/131856827/taseviwagu.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/1/0432/0182/2875/files/216_242-_1247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2958/4293/files/50257601411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/holistic_marketing_concept.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/lusomigenitiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/desumubepuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/33950075704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/nexus_ip_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/nupafaluxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/class_12_cbse_chemistry_ncert_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/harmony_for_computer_musicians.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3031/3122/files/pofopuxakejiwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.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_off00004e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E57 5784 bytes
SHA-256: 47b118cc4d8b24b7619ad2a085bacbfce76901556108de4d023d46adc02ee1fb
font_01_sfnt_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 10028 bytes
SHA-256: 212d33fbc6402dd1b814c5c1855f42be56c28a3ef2bcf6794ccff6040ecbbee7