Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc085499b4a225c8…

MALICIOUS

PDF

48.9 KB Created: 2020-10-17 11:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 00373995c4b33d818567a5da881fe02c SHA-1: 78a461b01b8804f73cf3dcdef32ee6a16618b546 SHA-256: fc085499b4a225c8345004317dc8ba94f2d571f4962f81991e2c9470a3d43539
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://cctraff.ru/strik?keyword=total+war+attila+huns+guide In PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/388f73687f5e7de.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/pitinoxamejutuw_ziwodafurox_pixawalubifesej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f893dade80a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8a5e38a8bab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f890c200b379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8834d4a46fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87330b4c636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f896fded5f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8a955e5aa14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f8933c6ef6c0.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/1/0266/9225/5921/files/android_messages_settings_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6691/6763/files/97826043550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7412/0597/files/las_profesiones_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5973/0839/files/wordpress_terms_and_conditions_popup_plugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/rowivebawufewumezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9849/9997/files/32050504241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5348/1625/files/73327026400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8689146c-5077-4362-97ff-c089cf39877d/78230874999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8fd8bf-7a04-4698-853d-4ca12d396f0c/fifowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a129c1f-81d9-4dd8-94af-b639ec3f5327/the_quarry_destiny_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c352f64c-725e-4a39-b33c-26f0acf92ad5/tibibemaluvakixunuzovowoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7e8b4e-53a3-4668-bfbf-bc4d03115f8c/39391527517.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_off000081c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C9 5128 bytes
SHA-256: 14abcde2372996bc30ca023ead695ca40ce56ca6539601863f15d779d0b61ada
font_01_sfnt_off0000933b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x933B 10200 bytes
SHA-256: aa9dfd263a1ff6198a94b9c6d62627d340b6a65475713fe8ac4964a03bc9bbb4