Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c6c3c95d36e59c…

MALICIOUS

PDF

36.1 KB Created: 2020-11-08 14:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5153b91f2c4269af1c10598afa8de040 SHA-1: f6cc8b14308ee729f4975af3b687eec1501727ed SHA-256: 51c6c3c95d36e59cc4c3586e38ef80584c5063829b9c8f3b5d625738ae9dd7d3
126 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?keyword=dr.+friedenheim+pa PDF link annotation
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/3808489.pdfIn PDF document text
    • https://wotufoxak.weebly.com/uploads/1/3/4/3/134308946/cf9456c5c2ec.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/towewopubiju.pdfIn PDF document text
    • https://bapijinujaf.weebly.com/uploads/1/3/4/7/134700097/1444792.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/biloxirolowipe.pdfIn PDF document text
    • https://visajemilami.weebly.com/uploads/1/3/4/2/134265887/minilogerogigilo.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/c8d70d8a371a1.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/89382c8c-4128-4196-bb0e-607b1ae4eb56/platos_theory_of_forms_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e4ece5-8010-4901-8022-a8940da240e7/59166574011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a441d133-7619-4cf5-b7d3-0103b84bff4d/6696105535.pdfIn PDF document text
    • https://sulifisaw.files.wordpress.com/2020/11/47623615834.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd90a8b-06da-4563-a8e8-4f80e10b145b/the_exterminating_angels_full_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/57292515525.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_off00004fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB3 5104 bytes
SHA-256: 19204f1e418a7c0d9414fde695c6ae4294bcaa5d8c9cbab1d1c7cb7dbca8a40c
font_01_sfnt_off000060eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 10320 bytes
SHA-256: fe993a0ad3756e2a67931d87ac609d83bf642bc6ff865df3926e9cdaa095a81e

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