Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3a9304d257c010…

MALICIOUS

PDF

39.7 KB Created: 2020-09-19 02:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73c38cc88748050b13f8d5067c04e2f6 SHA-1: b4866767fbd34da68bf8bf7981276bafab699350 SHA-256: 0f3a9304d257c010a72fe6e798e0b7fe6cea80ea5baf57aa208c4368cdd28c2a
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=mrs+of+science+sitecore In PDF document text
    • http://zapaxor.efclark.com/uploads/1/3/1/4/131437792/8eb50537a.pdfIn PDF document text
    • http://duluwi.innerzing.net/uploads/1/3/0/7/130739811/vemazafosuwiborabol.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/1/0435/5283/3695/files/bhangra_paale_dj_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/helmsdale_river_fishing_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/yajur_veda_avani_avittam_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/lesizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/fujobakaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7891/2917/files/goputebupazudisekuzox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6752/3491/files/flirting_with_june.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7172/0603/files/squatting_dog_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/98982655207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/musurazesar.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_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 4640 bytes
SHA-256: 9ad8b8cb6215717a07e413e2bd5fb56eece2261adbf49617045d47d64fb7ceb5
font_01_sfnt_off00006eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAF 10444 bytes
SHA-256: 5b062057f71dff03e3dff489679b6f9835d08af4ad150051ba42dd95f7187521

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