Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb83914986dbde67…

MALICIOUS

PDF

46.8 KB Created: 2020-10-15 20:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 53f4a8423324d84cb1f51f82b6a27b17 SHA-1: e5b5548bccff9c1615db063f5ad90d63aa7c44ea SHA-256: cb83914986dbde6733035e652af936c36f046c0da2d50dfc91f24132a97c0e5f
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://ggtraff.ru/123?keyword=smart+iptv+apk+cracked+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f87fe58d1a71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f874a94da917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f870ddf8bfbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d6bb65-208c-4ff7-b0ea-89aeec748a0a/kimebowepedemerumagakap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5dd18c4-a3eb-43c2-a6b7-51d3f30a187a/36115904177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6909b5-c34b-45d8-b1d7-96fd342fc5bf/58533410268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3528a3c8-17eb-4f8c-aa7f-c605202ab1a3/83833207578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c819b3f0-32aa-49b3-87f2-3369a762161d/jotizemosezirum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5856/9628/files/seven_years_old_lyrics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1554/5247/files/chemistry_chapter_7_ionic_and_metallic_bonding_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1373/4309/files/tom_platz_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7451/2806/files/naruto_online_mmorpg_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/jobedowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/casio_g-shock_mudman_g9000_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/beretta_m9_guide_rod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec66b11-352c-45d8-adad-374a6d57b18d/vaxaravorigotexugugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02eebcb9-323c-4add-8883-e5b56d749528/19195735522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac6dbeb-1626-4b26-8fe2-639822b8d92e/35786347276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a305cf2-7d00-4f02-b68b-62c550b500fc/disekimijuzelibiwomufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d81a93c-80c3-44f3-864f-e5c3637ae902/21392662675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7a9414-febd-4732-9847-e03cbcd2f983/jubaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7afe1e-138d-4c53-b8cc-61fef9e7ddd1/vagejurebotujimififupepod.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_off00006f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 5360 bytes
SHA-256: eb7fd2bbc2e055449025848d4c9a9d89347ea75d4876f34de0b5988543b6c2dc
font_01_sfnt_off00008168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 14028 bytes
SHA-256: 55dfa3eafea59eba6598dece1796c2dd853c6d00fb7f383443ef2a2048391d94