Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a9bab11d7d48a5…

MALICIOUS

PDF

35.5 KB Created: 2020-11-08 13:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 74fe216b379db2778eedd4285f1d8565 SHA-1: dc42bb92569a1466f920a994abb2402e18ff508e SHA-256: e0a9bab11d7d48a5e42651ceadda24194f222c53bcc31ef2c37a7ea9d3e766f9
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://trafffi.ru/aws?keyword=the+celestine+prophecy+an+experiential+guide PDF link annotation
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/1775039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5fa3825723475.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/7318911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f94b1405ce92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_5fa7594062de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_5fa4c3533f272.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/eb69a30b-c4b7-439e-81d7-8c855a756bea/82213564134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ebd16d-5c0e-48f5-bd4e-d268dcc86c26/97841776350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5576f475-2abe-4ed2-857a-af513ec61e5c/oldest_player_in_nhl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c19fdd1-caae-4982-b578-8e0103c5c18d/rounds_canons_and_fugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1711a06-8941-41fb-b2bf-615e6c160583/milliken_publishing_company_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a17b38a-8cad-4f7e-983f-5d621ddc1639/65433756865.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_off00004e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E73 5452 bytes
SHA-256: d24fec38ed4455daa782e54da74fd880db2ba8a0309d03c6240b637e575a32ee
font_01_sfnt_off00006107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 9520 bytes
SHA-256: ff03df42f5b368a335a3bc72532e13e93ede1195f15eb2b37bd0a5bacce16486

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