Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a306374af45c77…

MALICIOUS

PDF

71.2 KB Created: 2021-04-01 14:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b5bc89c2ca0c6eecf2f7d980b8b148d7 SHA-1: b5d018b0c611370b30e68fac06bf962bd9464a68 SHA-256: 69a306374af45c774aaee35f1a7b42fca5bab62fdf08140c646f58e2b16a7816
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The embedded text and URLs indicate a lure related to 'apk editor free fire diamond hack', pointing towards a scam or phishing attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links supports a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=apk+editor+free+fire+diamond+hack PDF link annotation
    • https://gifapaneg.weebly.com/uploads/1/3/4/3/134368366/luwawexilimefi_wikexaginile.pdfIn PDF document text
    • http://nelomevasusuf.22web.org/fowogarolaruwek.pdfIn PDF document text
    • http://help-copyrighteamservice.com/478003701829t9g1.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/pugiji_vilinosusak.pdfIn PDF document text
    • http://timinome.getenjoyment.net/edexcel_a_level_physics_revision_notes.pdfIn PDF document text
    • http://moreprodukti.com/piazzolla_oblivion_cello2d6kt.pdfIn PDF document text
    • https://lefawiput.weebly.com/uploads/1/3/5/3/135324435/338488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/nononawisufosema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed4b64b-b885-47b7-9bc6-5a26790aafa2/40986146154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360b7b40-8bf4-406e-adf1-c98c043f9bf6/38389259924.pdfIn PDF document text
    • http://rimuvuvipimube.epizy.com/ca_lottery_winning_form.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_6eafc4ff8542409eb8135dc8bc8cb6e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8633b1e7-cb64-4a5f-bfac-21483fd287a1/71022931210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21ceae3-4ae7-42dc-a4b8-bcf73914d77f/18408770462.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_9a7c2315c2514d9a8058dc8073383502.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e71b092-0aa2-48c7-8b4c-9e196daaa146/stock_market_crash_1929_apush_quizlet.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_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 5236 bytes
SHA-256: 165adbbaab29b094b55c3aa8d2c31a3b5de5e672ba60a4327396f9ba3c7bfe79
font_01_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 10948 bytes
SHA-256: 5aa099bb646ad8e68b8ed8c268e69aa7ea42a09bf43aba8a956a3b504ce3e3a9

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