Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa162529f59291a0…

MALICIOUS

PDF

47.1 KB Created: 2020-10-20 03:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5c087d88396c480acd91b24364201362 SHA-1: 6b27aa540baeb50b98b64c2c9b6ff3ff0da41a24 SHA-256: fa162529f59291a052f19907461c9a44d512727dc4f4b01004cb54666da293d2
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://gettraff.ru/123?keyword=jpg+file+convert+to+pdf+free+download In PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/tapategajevawopaji.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/fcd7ba93a0cb62.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/34f36d856e5e599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f8e226482d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f8da19a53686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f875e22b3560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f872fee4ac92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f8a1cfe53efd.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/marapabi.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/e71d5b95e089.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/051bfa56.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/degip.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/1/0498/9331/0631/files/kenimanemud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/download_mobizen_mod_apk_premium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9086/0950/files/precalculus_exponential_and_logarithmic_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/motorcycle_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1593/7441/files/dojexebim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/manimedeleruren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8686/4278/files/sample_letter_to_the_editor_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9270/0062/files/samsung_tv_stand_screws_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9177/5654/files/minurexiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/denyo_welding_generator_manual.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_off00007866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 5288 bytes
SHA-256: 5c0b44b83b8398227b67b70f21c09b25bde91ff3d61c24c757e9aba4a036c01f
font_01_sfnt_off00008a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A83 10772 bytes
SHA-256: d62f0ec5853f3ec766105de7c4504a8a2e208e3e7aa4b70bea5eea6192be235b