Malicious PDF — malware analysis report

Static analysis result for SHA-256 8493b708e560dc66…

MALICIOUS

PDF

48.8 KB Created: 2020-11-06 15:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4f1b6f4a7b01ea5cb8ee60d890555c7c SHA-1: d36fe8c09932a980bca778a6f4483c597ddb58e3 SHA-256: 8493b708e560dc661a44fdf27fc077b2b43302dc8a4671f05bba79aaff184799
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://traffking.ru/123?keyword=beat+thang+virtual+pro PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fd9b3011-005b-4f4c-a8f8-bcd74b04cf0b/36067351677.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/vupezul.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/where_is_fort_ridgely_state_park_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/adding_rational_numbers_worksheet_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5afdb8-7635-4f9e-9de3-0f5fc83a3d68/tozirofuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da02da2f-c511-4453-b1ab-e7406746b6a2/95184377457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7068a53a-e273-4662-aa9c-76a24cc24de5/ratomovovavatenubixaduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9e5dd1-6e9b-4780-9fc4-81f1f346c1dd/peaceful_pill_handbook_download_free.pdfIn PDF document text
    • https://xasavibe.files.wordpress.com/2020/11/govubogovupaxakegadubuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85af9cd4-4051-427a-8514-c9ce32647f73/jowutizegozufapixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463f7a1f-0e46-4990-b6b4-02c6f0e87f71/the_blood_will_never_lose_its_power_sheet_music_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0082ef-602a-48ca-958e-8de2814534b9/kekemopujosokimonanafonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c5e48a-6eb5-4ad5-88e7-d2e1b824c267/rufakezesapiwofejiso.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/gmetrix_excel_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d53bf4a-cb09-4cd8-821c-3d3116949c7a/21433785914.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000718e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 4896 bytes
SHA-256: d8de74ea7cdfdeec3762641b93f9125187349d4a2337454d5469bfac2a46d755
font_01_sfnt_off0000822c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822C 11180 bytes
SHA-256: 1a96d0a01494b70aeafae15a57433abd32c78ac4ecf9f71dc3edab372cae0e3d
font_02_sfnt_off0000a88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA88C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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