Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b075232de935c51…

MALICIOUS

PDF

50.5 KB Created: 2020-11-08 23:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: bca8b9317c4c5bdbb7fe8ac07d288c81 SHA-1: 15a21c505b88d8fed53c2784c7f0c4a33d8634a5 SHA-256: 5b075232de935c517c31329613700253000f3e55a18cd038fd79723ab3342140
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://traffset.ru/aws?keyword=chemistry+naming+elements+worksheets PDF link annotation
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/dufojateduruxu_molep.pdfIn PDF document text
    • https://tefizaset.weebly.com/uploads/1/3/4/5/134587169/foxenasatiz.pdfIn PDF document text
    • https://dobekaveliwe.weebly.com/uploads/1/3/4/5/134599348/edd1116d9f5ac.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/df5905fa6.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/d37126e73.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/fuzidex.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/kusazoxazejanebada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://totejefuk.files.wordpress.com/2020/11/practical_magic_alice_hoffman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11afbd07-2151-4aae-96f5-c5c7382e0ab6/8567593314.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639c22cc-a3a6-45e3-a2ff-0c425cc9fdb4/the_big_book_of_juices.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/list_of_extreme_sports_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/reviews_of_tripbeat.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_off000067e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 5260 bytes
SHA-256: dc6933cbb68c3aa78c80191c9f27a0157507031a4d92c6c5294684d95aad5bb7
font_01_sfnt_off000079aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 10384 bytes
SHA-256: 82e15c01891bc627630a3a2eb50985a5edc07c9934e8d593ca5db8097d173333
font_02_sfnt_off00009d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D65 20020 bytes
SHA-256: 559a84a6b37c604d87647c1a2cc41cba8c6c5438673e4f838ecf42442c7b3866

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