Malicious PDF — malware analysis report

Static analysis result for SHA-256 574101bde01d4318…

MALICIOUS

PDF

88.4 KB Created: 2021-04-08 00:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ba330fc51a2466d1c23aab7876511c53 SHA-1: 4a586b64ef263aeb6fc0bf331672ac77b2e82b1d SHA-256: 574101bde01d43185decf94f2450fa460ae7ce964569ee9005295dfe2762ec74
66 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically flagged as a redirector on disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of numerous links and the ML detection suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://druttle.ru/strik?utm_term=saitek+x52+review PDF link annotation
    • https://cdn.sqhk.co/tedalome/avjajje/stickman_superhero_mod.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/candlestick_patterns_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/hjhbgjE/hmrc_self_employed_grant_coronavirus_contact_number.pdfIn PDF document text
    • http://sinelejijona.22web.org/12209488181.pdfIn PDF document text
    • http://gatigade.iblogger.org/all_important_name_reactions_in_organic_chemistry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_70b6a553b5f14428adb4252c227f9c31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/how_to_install_realtek_audio_driver_manually.pdfIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_9db4908321604c91ba593f3c99305beb.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_b78c7a69f86a43319a5760dc6894ec6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/32915303121.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/intro_a_2008_dressage_test_free_download.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_6bd7144b71f14f99b4edc3e296ef080a.pdf?index=trueIn PDF document text
    • http://pujumek.myartsonline.com/nejebikunabaseseguj.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_391bff8ea31f48a09a5a54b75c8b09f3.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_3e5db4a0d6a847e6a4d0078d5a08a8cc.pdf?index=trueIn PDF document text
    • http://xiwewalatefefus.epizy.com/sipozepipowoga.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_95a0166279b84a459dee79c07bb5a5f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/45296547383.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_b2014c469ea44d32b7b728f173b4b255.pdf?index=trueIn PDF document text
    • http://dipagepe.atwebpages.com/tesis_descriptiva_comparativa.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/4621932182.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_off00011afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFC 5112 bytes
SHA-256: 0612e400fd44b5f1f72b4d9822a6d50728ff6f9df24229e726bf3eb254ed936c
font_01_sfnt_off00012c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8D 11828 bytes
SHA-256: b03c2545d47fd4db93088b4f5116c6b09bfa394a48edfd9744c891b86b6a90b9

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