Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3c8ce7cd1e6747…

MALICIOUS

PDF

83.3 KB Created: 2021-03-28 09:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6bdec119d8d0260648a1a7fccbd098de SHA-1: 20a0f7e0315e8457ac47fa3f2c9675659013819c SHA-256: 6d3c8ce7cd1e6747e5acd6ab56e2e5fc1c347c88c8702fd3b0619816777ad3b2
96 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, identified as a link farm, with the primary URL suggesting a lure related to 'anthropometry in interior design pdf'. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the structure and numerous external links point towards a malicious intent to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=anthropometry+in+interior+design+pdf PDF link annotation
    • http://jepenufi.getenjoyment.net/65353238383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_60148a311bb6c.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/madar.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/47342433267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601779f8844df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/zuripuvazakukejeze.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/69356918582.pdfIn PDF document text
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_48cdd4fc8aa042038d82ba71d91ab44b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/matlab_subplot_gap.pdfIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_503d8356caaa495dbb8ee55b9549c365.pdf?index=trueIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/jonosidexa.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/50830625910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9675e394-be47-4c58-89fe-8f41663f51b9/officejet_pro_8600_printer_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/harry_potter_and_the_philosophers_stone_movie_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a290c9c5-6819-4ba2-b742-5a287aa82085/38545785655.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/63289540455.pdfIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_81144ffc58a647a094cc40fb117beb55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/how_to_use_howard_leight_impact_sport.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_0616924e2edc4de38d764a002d865d11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/fuwetunoxigewuz.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_b7c0986db75f43658888a5a0932994e5.pdf?index=trueIn 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_off000107d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 5304 bytes
SHA-256: 8e9f30842b59a5cd45f7338b2be1808aa475930b189f3d554283b259b5d67561
font_01_sfnt_off000119cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 11188 bytes
SHA-256: b5606d4446199b4d9444e9f463ba7c3f6eb707fb2686f21c16d8e19432ddaa02

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