Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ea7b95467b5a30…

MALICIOUS

PDF

44.2 KB Created: 2020-11-09 14:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d3d22a54830ab04a1086effcbcc2d3bc SHA-1: e6ae540df3a09f7c3565bdd571a09d41498c5ab1 SHA-256: d2ea7b95467b5a300c4006ded90eee99d9d128d36e52dba4c80d84989e9c59c3
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/123?keyword=geometry+dash+sub+zero+apk+full+version PDF link annotation
    • https://gavuvikiji.weebly.com/uploads/1/3/4/6/134674568/dijewu-tefazuratus-ledadopasupi.pdfIn PDF document text
    • https://lovemaxo.weebly.com/uploads/1/3/3/9/133997317/sedafuzeromupul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e336235-2418-4892-96bb-8d70eb949ddf/tikok.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/town_hall_9_war_base_layout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ebb66f-ee79-4e4c-b8d5-e44b9a9c4a5f/zuzamadodonidil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1b6c03-22ca-4599-a7eb-ee007e21c410/jinenemevalomubex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554da9ec-a218-4d3a-9478-f67bc79c4521/vapor_compression_refrigeration_cycle_ts_and_ph_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b05033c-cfab-46d2-84d5-bc27cde33bf5/cpm_integrated_math_3_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3087c269-e8da-4081-8136-886fc979636a/21801373975.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/26913866817.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/zukabenakidor.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_off000057ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EE 5728 bytes
SHA-256: b7617fbf3de9d672d2a7287037e8e270e4dc88fb4192b48f9f54843e1d9f4a7b
font_01_sfnt_off00006b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 10308 bytes
SHA-256: 51611de2fa8752403e4b2d16e60a5de609e0c8e22c33884ad8ffc760085552d5
font_02_sfnt_off00008ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA2 16104 bytes
SHA-256: 9f858655571ea719834e7f05387c4c83781056d704dc0a8044185ef8d130ca3f

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