Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e7073b1ce5ed20…

MALICIOUS

PDF

34.3 KB Created: 2020-11-08 23:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 79dd67b8c8b62beacbc03d2e2c73fac5 SHA-1: 072a714f3db9292896c15936fa9408a1f75fbddb SHA-256: b5e7073b1ce5ed201e0de6175acc4d25b3f6f4f2f52b79425b22d621e794174b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=constitutional+crossword+puzzle+answers PDF link annotation
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/xeridibur.pdfIn PDF document text
    • https://wukepilunofabuj.weebly.com/uploads/1/3/4/4/134431708/lukasitep.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/b6ee5f51b3.pdfIn PDF document text
    • https://devomejot.weebly.com/uploads/1/3/4/4/134491467/sawefatakivobevufus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/how_to_get_free_tiktok_likes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab18b5f-62a1-4db4-b0d2-c4e38e1d4879/kea_student_login_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/jukutagagululilewamat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1228cb-3622-42e3-89f7-e55860fdb20b/36179505987.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/super_mario_world_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aaed0d4-52c0-40d0-a0f2-428b594db203/78261049199.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/amar_ujala_hindi_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6f51c5-eb64-4195-b378-383862241b5c/nojerivusomefojefula.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/75982916916.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/mozosobekanefapezavili.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/anemia_falciforme_usp.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_off0000490c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490C 5116 bytes
SHA-256: aaab8cf1896c2afe94289677d7730a2c2514d71ddaaafc9610b062fc6ef634b8
font_01_sfnt_off00005a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8F 9852 bytes
SHA-256: e9400328957b6ca169afb93d6778a6b0d7190edaa71328dd27c89801d02c29e7