Malicious PDF — malware analysis report

Static analysis result for SHA-256 094fdfbddfa153ff…

MALICIOUS

PDF

45.5 KB Created: 2020-11-09 12:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b7a3c21ae15f105d254caed0790d0121 SHA-1: e9be6f366548cfa78d44f92efed546f0a4bcc703 SHA-256: 094fdfbddfa153ff9c44fbf84a1a6da44e181dece6a5850dc2b97596accacbdb
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://traffking.ru/123?keyword=chemistry+exam+2+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f88fe6ddaa01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f952a16c52e5.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5fa8a845b7a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f8a6b04b0c32.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/jireku-tinariborefeza-dadakabuxoki.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/b2f6b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/widofafane/fotasovade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34755be-af14-4dc8-89ce-1acd49026a34/car_alarm_system_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79d740f-da68-4a4f-8746-fd710b4c3c99/in_which_of_these_bonding_patterns_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b00ad53-c566-494e-9515-cd25eec3194f/lubulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ac5a2f-45e8-4b7f-b5a0-206bc56558e2/kelewulolinivigo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6625 5196 bytes
SHA-256: b5ae5e83a1ddfdeb547bf664b6102463ed9ff653699a50df0faa5be4cfd148ed
font_01_sfnt_off000077d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 10348 bytes
SHA-256: f5cdc4fc25f50ad4ef8711f22bbfea9b13d436a48958d15566ccc7dceb659586
font_02_sfnt_off00009b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B03 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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