Malicious PDF — malware analysis report

Static analysis result for SHA-256 803880f92625cd5f…

MALICIOUS

PDF

37.4 KB Created: 2020-10-06 11:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f1d7f3534ff50f0bb4612c32eb7c7410 SHA-1: be3faecb57cdd2967d3a810c8795d23a731d97d9 SHA-256: 803880f92625cd5fc78ffa2466eeeeb29af8b434b02ac4be5b0ef69eac9562a3
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bukunmi+oluwashina+picture In PDF document text
    • http://files.arkainc.com/uploads/1/3/1/4/131482937/f033ffa7bf97.pdfIn PDF document text
    • http://files.cameronbain.com/uploads/1/3/0/8/130814402/lenufagovejopigilefu.pdfIn PDF document text
    • https://site-1040178.mozfiles.com/files/1040178/77057866435.pdfIn PDF document text
    • https://site-1043279.mozfiles.com/files/1043279/24541142113.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/93259311064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/remote_control_chinook_helicopter_toys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9776/3229/files/city_of_heroes_incarnate_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2445/2254/files/pink_dreams_cigarettes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/36549334480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3339/5868/files/palm_trees_in_the_snow_book_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4371/1907/files/82920915480.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A4 5260 bytes
SHA-256: f79c94bce0dd279396a066922d76f6da1f64bacbb03401265ee02ad3a765578b
font_01_sfnt_off00005964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5964 9772 bytes
SHA-256: 766e9e69849d071068e6a7f9b80be683429d00accb761af13fb54b4073725a4f
font_02_sfnt_off00007aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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