Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf57d5b06bd88f0…

MALICIOUS

PDF

69.7 KB Created: 2021-03-24 07:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ea091a919d4997319f57185b8a60da2 SHA-1: e8cc9d93d4ebc9d80b3ae409667604f270ff8e9c SHA-256: bdf57d5b06bd88f092b10c420e0f1ac34901c3df7833a356736a0d64d2d38282
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 0.9998

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://ponafet.ru/wix?keyword=dr.+jennifer+daniels+youtube PDF link annotation
    • http://gratoram.site/what_is_the_play_beauty_and_the_beast_aboutmpxos.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/2461914.pdfIn PDF document text
    • http://chambrely.xyz/does_planet_fitness_do_law_enforcement_discountszfenh.pdfIn PDF document text
    • http://lighttravel-ng.com/how_to_draw_a_animated_person_step_by_stepsfw1h.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/9048277.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/nupotukig/bujuzuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3996b124-70fc-416f-88a6-f69acda0465f/left_hand_of_darkness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2850c796-03a6-45c0-8f81-4cbcfe3f7c1f/why_is_my_monitor_not_turning_on.pdfIn PDF document text
    • http://linopiziv.epizy.com/zoputepirutubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14ad55b-c33a-4245-b886-d8e51a31ee48/bavefotuwegozonumebo.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/acute_otitis_media_with_effusion_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/mumapafijoliduvudokax.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/fatca_reporting_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6907d7-bc84-4f8f-9624-1d3ddedb55b3/xokuwizafokesefumatesa.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/business_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b454cd-9f82-4c70-8a1b-44d556013d93/davukeredimonuwojifeziz.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/queen_azshara_guide_mythic.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_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5252 bytes
SHA-256: 2eb4408112cfa557ff14b09110583c3111275c3ab8724f412ebc863b27677e8c
font_01_sfnt_off0000e623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 10024 bytes
SHA-256: 8bb3516a19d94352b1fcea5c0a2fe0c50b14103834b54c405ec994cdb7bcfbfe

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