Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de546eba7a424c9…

MALICIOUS

PDF

47.0 KB Created: 2020-10-01 06:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 57aa3244b7d52f7c4e9039ca3a9f5a85 SHA-1: 1544fa34ea4df295c57ca4fb7720d90013c0ac42 SHA-256: 3de546eba7a424c96a539ba50f6e3cbc507b08eb62538404bacd92225fa98b52
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=changeling+the+dreaming+20th+anniversary+pdf+download In PDF document text
    • http://lomodi.marchdrumcorps.com/uploads/1/3/0/7/130776783/waxulutonefobedeza.pdfIn PDF document text
    • http://files.waynepyle.com/uploads/1/3/1/4/131437181/8474722.pdfIn PDF document text
    • http://files.napashuttle.net/uploads/1/3/1/4/131437293/somovilajimezeg.pdfIn PDF document text
    • https://site-1038454.mozfiles.com/files/1038454/junuw.pdfIn PDF document text
    • https://site-1039801.mozfiles.com/files/1039801/bowukekoledigonetik.pdfIn PDF document text
    • https://site-1037282.mozfiles.com/files/1037282/punenamikevutikutalij.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/bajexazixukogatova.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/1/0434/0989/9670/files/3197628281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/5989/4440/files/oak_island_stone_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4544/1695/files/fupiluxemina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/download_free_showbox_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/cp_and_cpk_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/gusekakerod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/nafazirakajuwa.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_off000075ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 5888 bytes
SHA-256: 30ee9483d41ff290f434cee1aefb5d47c7a410bef2a7518ceaff74ff48370ce1
font_01_sfnt_off000089a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A2 10996 bytes
SHA-256: 263ed083b8a098e7335a2f903dcaf3db53fa24979ed1c2a613514236c4e21ce2

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