Malicious PDF — malware analysis report

Static analysis result for SHA-256 91619e3c9a53330c…

MALICIOUS

PDF

40.6 KB Created: 2020-10-09 07:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ef1126833a46e4ded872e0b75cc8707 SHA-1: fd3240d6fc1652eb2041edaf50a738efe145dab6 SHA-256: 91619e3c9a53330c2d9e59d02faac4ca9c0884d4b28941cfc850878c94084d8d
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=mastercam+cracked+software In PDF document text
    • https://site-1042446.mozfiles.com/files/1042446/71447362951.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/59806833638.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/pakuzixojawekufisi.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/37578547715.pdfIn PDF document text
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.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/1/0458/0219/3062/files/legend_of_zelda_breath_of_the_wild_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/bearded_dragon_mouth_open_while_sleeping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6841/4370/files/high_relief_sculpture_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6eeeee-d5a5-4641-a63d-1352355dc45c/65558838197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aeca644-80f8-438a-b245-ea4964644cc4/bumewapokegijoxovamej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fe09f6-a5f7-45e1-9ee9-4ef632c932c9/51833532060.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_off0000606f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 5296 bytes
SHA-256: 609777e9e70c4658fdaa5224732c7bd6cd80ae32623bf4ef6678c81a6ba91a20
font_01_sfnt_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 10436 bytes
SHA-256: ab58ef32c4212276b1f0b67f1680326a4d083c4fc8c83d9e74c470b22431fc97