Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d1def12b9bba3f…

MALICIOUS

PDF

32.3 KB Created: 2020-11-07 05:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: be05ddc7259db521642b500a1bc99bf1 SHA-1: d93aadf3d32b75e536216672d9ec11a371c153b5 SHA-256: e3d1def12b9bba3fc8f8455e5633585e5fc7e33ef43c02c7fba46e9c15f00a2e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?keyword=dr+seuss+games+for+kids PDF link annotation
    • https://zowupenejanelaw.weebly.com/uploads/1/3/4/3/134397621/kofelina-rugododatime-digabog-zowilujedoni.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/digireduguv.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/e6781da0-9ab0-4438-8ade-5c60944d7ae4/mibigafuvefurofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284c3455-3125-4409-a518-1d9bb2edb5ce/tunogagunipabejajelesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b24783a-c2e7-4b41-bd2a-88d0bd5adbbc/waritek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e6fc1f-578b-4457-82f7-7da5fad4e632/would_rather_would_prefer_exercises.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e6360d-a774-4cda-ab92-4325dc8c044e/the_thyroid_connection_28_day_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faf1eba-49c7-4ecc-9408-d3ce8305c296/codes_for_woodcutting_simulator_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/pujegusaxunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde4e5a4-bdd9-40bd-a5bb-d3a6c86d8a07/daregugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690ce891-e10b-4a15-8456-f5a65f92b0c8/piratebomukama.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/reynolds_middle_school_staff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df21f3e-c5ea-48fa-9f63-5934b3735e4b/abo_study_guide.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_off000042a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42A1 5260 bytes
SHA-256: ef8657b0a2b5aae61ceff10ac2f685a9f8e7a668f24b3a41a06df53fc8ff97e5
font_01_sfnt_off00005479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5479 9452 bytes
SHA-256: 148cc38a7727ee933550f863ad102fa82c6ff07139015712246dbfe6a134dc40

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