Malicious PDF — malware analysis report

Static analysis result for SHA-256 c496b26db2e892d0…

MALICIOUS

PDF

44.8 KB Created: 2020-10-16 11:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4db34cf87553bda1ebc02df19b838eb5 SHA-1: eaef2e91e9ecbf945aae7338ec87b5943b28f70e SHA-256: c496b26db2e892d0a22f912957dc660f4f46c23cf1784432388a02d39f7355a0
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=photo+to+pdf+converter+i+love+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f891fc074b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f885c66afccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f893668e45a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f88bae5f384f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8750ae19d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f89254a23f76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f87307264db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f87c4ef4f248.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/1/0502/3449/1080/files/20394383030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7903/3518/files/tafuvipovukujak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7834/5402/files/62759485916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/hills_tree_farm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/31895651782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/44010979277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7224/4900/files/happy_wheels_hacked_totaljerkface.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/minecraft_vertical_slabs_1.16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/zumafijewajafavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7800/0026/files/37619413388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/22565003356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0464/1436/files/sovozakilipitajaxepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2228/2663/files/gupefogoxinizafizugewopot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6100/8288/files/12751398061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4163/files/retractable_pet_gate_as_seen_on_tv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/coil_spring_booster_reviews.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_off00006a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 4916 bytes
SHA-256: e95de9ce22f328ce9096aa5a85d37b2567b6db6098bb0080909ec810e86cfbd6
font_01_sfnt_off00007afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFA 13368 bytes
SHA-256: 0a8c4001132cc62fc79eccfd3953e351e8dcf1b98dfdb3b37ccea1b9e2b7e2d3

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