Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcccaa8d45a5b332…

MALICIOUS

PDF

38.7 KB Created: 2020-10-01 17:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0cd187c40fa9e5794181c5b68e98d93e SHA-1: abe819ee0fb4e06ef8f3f3d492a0b3bf205acbf8 SHA-256: bcccaa8d45a5b3321026f2d3031f3d2123a1a0c04034aec033053cc340fe3c36
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://gettraff.ru/strik?keyword=vitamin+b12+foods+list+pdf In PDF document text
    • http://mozuk.awarenyc.org/uploads/1/3/1/4/131406665/numutalate_naxaxoxapin_kodakop_sudajof.pdfIn PDF document text
    • http://files.liapinelli.com/uploads/1/3/1/6/131607438/xetogoku.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/60869961523.pdfIn PDF document text
    • https://site-1039341.mozfiles.com/files/1039341/vojujeteroj.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/77340366254.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/11463171579.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/1/0480/8776/1059/files/lubolokeben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/pioneer_surround_sound_system_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5147/7913/files/heian_nidan_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4973/3282/files/frayer_model_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/area_of_a_rectangle_kuta.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_off0000599b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599B 5380 bytes
SHA-256: 6fb6570f711f7893b6b5f2b934165fe07345f17911cd033030480201cf67ef3b
font_01_sfnt_off00006be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 10048 bytes
SHA-256: 6b265d300d6e912cfb65a8936e9d9ef6021fc69abe434f6945b09fe9e9fbd845