Malicious PDF — malware analysis report

Static analysis result for SHA-256 541ae7e1dddcca68…

MALICIOUS

PDF

48.4 KB Created: 2020-10-15 03:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e2030531d8be34dd2c86fbbdc62d70b1 SHA-1: 972aabc469360d939bcb41c2da1badde0b31245f SHA-256: 541ae7e1dddcca687aa589b605329b964f763ed0bea33ae7bd644fcb9a211663
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://gettraff.ru/123?keyword=multiplayer+master+apk+apkpure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8774dd70e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f8748785b795.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/4a6dac.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ad9d4.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/9225f5590a2.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/90599.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.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/1/0433/5747/0872/files/sowidosuzebisejufeguju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/chris_watts_confession_to_dad_transcript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9203/files/sterilite_storage_cabinet_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4594/0128/files/32044853357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3183/4009/files/free_interracial_romance_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563f8914-31f7-479a-accc-2d8972e4d22c/kakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6ef159-64a9-4a91-b3bc-edb296291d1c/tonarijezozaxakifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba53178-d7a3-4d3f-8213-abb51d3c698f/35240379850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7705388-891f-4c0a-bb0e-a556e41550c6/87032421684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62274df-b3ba-4c68-be96-652fd7152be4/8676746586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a5c155-70b5-4da7-8ed1-d4a2c90a13b4/medamimekabavewuzaturega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4ea2b8-9c6d-45d0-b71e-ea66b1f5a7c1/34308370278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a151c9a-dac4-4ae8-b3c6-ad0ba7ef7a9a/24891912337.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 5136 bytes
SHA-256: 17672bd342b371c032640c83b115cc38e1e4e04a45d896d6fe2db0e1e60df2b5
font_01_sfnt_off00007ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 10660 bytes
SHA-256: eb018fbace70ea6fdd3934591caebfff158bb6ce3abf2674b07250adc352fe19
font_02_sfnt_off00009ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED6 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140