Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0520903e769d61f…

MALICIOUS

PDF

63.6 KB Created: 2020-10-31 18:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 23de245dac76ad84ee6add912bbd11f0 SHA-1: 0348b6e05fc44acb41d0ea3273a3d65291dce0de SHA-256: f0520903e769d61f880b9c23877526cbbfd852ca87f6d21d6105e7621fcf8878
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://cctraff.ru/aws?keyword=overwatch+trophy+guide+and+roadmap In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_5f9a850eacfb3.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/43ec7e21c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f880171defc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f905e453ac2c.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/73179efb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f870c17e0c65.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/1/0437/0743/3125/files/mist_of_pandaria_leveling_guide_1-90.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7ce533-dd62-47ac-bcf2-faf628eda467/basic_mathematics_books_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f045f6a6-c789-4162-8446-8be198ddcfbc/22854881326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496f9f85-f220-47c8-90b4-0e13914d509d/20450501590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/pokemon_go_hack_apk_download_with_joystick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d4badd-08c6-4663-ace6-ffeda333b629/pubadozofakebod.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/injustice_gods_among_us_mobile_hacked_accounts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9d97a6-4507-40ca-9001-7c1a365510d9/xosolipekabelev.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c792.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC792 24472 bytes
SHA-256: 91cba4aaa4b448e8fa0cde7c264ea74feeccb3fad8cc63599bf1c917d6b82e93
font_00_sfnt_off00008f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 5556 bytes
SHA-256: 34e3797508fdfe3f7bb1f0bf2451e97182d356ce9504a850b7831a5c08b050b7
font_01_sfnt_off0000a213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA213 11108 bytes
SHA-256: f7429d9b85ab9e84cbff98bd696b0bfaa845ab0b5cdb7018f0a7d8416b98503b

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